/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/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:43:04,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:43:04,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:43:04,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:43:04,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 20:43:04,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:43:04,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:43:04,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:43:04,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:43:04,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:43:04,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:43:04,226 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:43:04,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:43:04,227 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:43:04,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:43:04,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:43:04,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:43:04,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:43:04,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:43:04,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:43:04,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:43:04,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:43:04,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:43:04,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:43:04,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:43:04,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:43:04,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:43:04,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:43:04,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:43:04,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:43:04,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:43:04,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:43:04,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:43:04,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:43:04,232 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:43:04,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:43:04,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:43:04,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:43:04,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:43:04,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:43:04,629 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:43:04,631 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:43:04,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-02-19 20:43:04,633 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-02-19 20:43:04,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:43:04,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:43:04,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:43:04,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:43:04,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:43:04,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:43:04,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:43:04,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:43:04,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:43:04,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... [2021-02-19 20:43:04,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:43:04,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:43:04,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:43:04,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:43:04,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:43:04,822 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:43:04,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:43:04,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:43:04,822 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:43:04,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:43:04,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:43:04,823 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:43:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:43:04,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:43:04,823 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 20:43:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 20:43:04,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 20:43:04,823 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 20:43:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 20:43:04,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 20:43:04,825 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:43:05,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:43:05,135 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 20:43:05,136 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:43:05 BoogieIcfgContainer [2021-02-19 20:43:05,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:43:05,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:43:05,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:43:05,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:43:05,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:43:04" (1/2) ... [2021-02-19 20:43:05,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1784e5a7 and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:43:05, skipping insertion in model container [2021-02-19 20:43:05,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:43:05" (2/2) ... [2021-02-19 20:43:05,145 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-02-19 20:43:05,150 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:43:05,151 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:43:05,155 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:43:05,156 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:43:05,256 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 20:43:05,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 20:43:05,339 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:43:05,340 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:43:05,340 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:43:05,340 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:43:05,340 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:43:05,340 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:43:05,340 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:43:05,340 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:43:05,352 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-02-19 20:43:05,437 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:43:05,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:05,461 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:05,461 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash -430114731, now seen corresponding path program 1 times [2021-02-19 20:43:05,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:05,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971366561] [2021-02-19 20:43:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:05,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971366561] [2021-02-19 20:43:05,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:43:05,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 20:43:05,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833248001] [2021-02-19 20:43:05,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:43:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:05,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:43:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:43:05,729 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:05,803 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-02-19 20:43:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:43:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 [2021-02-19 20:43:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:05,840 INFO L225 Difference]: With dead ends: 854 [2021-02-19 20:43:05,841 INFO L226 Difference]: Without dead ends: 823 [2021-02-19 20:43:05,842 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:43:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-02-19 20:43:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-02-19 20:43:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-02-19 20:43:05,974 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-02-19 20:43:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:05,976 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-02-19 20:43:05,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-02-19 20:43:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:43:05,981 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:05,981 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:05,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:43:05,981 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:05,983 INFO L82 PathProgramCache]: Analyzing trace with hash 120875477, now seen corresponding path program 1 times [2021-02-19 20:43:05,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:05,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335424290] [2021-02-19 20:43:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:06,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335424290] [2021-02-19 20:43:06,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016221160] [2021-02-19 20:43:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 20:43:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:06,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:06,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 20:43:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451538385] [2021-02-19 20:43:06,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:06,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:06,272 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:06,490 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-02-19 20:43:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:43:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 20:43:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:06,505 INFO L225 Difference]: With dead ends: 1573 [2021-02-19 20:43:06,506 INFO L226 Difference]: Without dead ends: 1573 [2021-02-19 20:43:06,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:43:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-02-19 20:43:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-02-19 20:43:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-02-19 20:43:06,573 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-02-19 20:43:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:06,574 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-02-19 20:43:06,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-02-19 20:43:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:43:06,578 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:06,579 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:06,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 20:43:06,807 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:06,808 INFO L82 PathProgramCache]: Analyzing trace with hash 41703767, now seen corresponding path program 1 times [2021-02-19 20:43:06,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:06,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698534000] [2021-02-19 20:43:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:06,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698534000] [2021-02-19 20:43:06,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506544746] [2021-02-19 20:43:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:06,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 20:43:06,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:07,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:07,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 20:43:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834425629] [2021-02-19 20:43:07,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:07,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:07,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:07,043 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:07,199 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-02-19 20:43:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 21 [2021-02-19 20:43:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:07,224 INFO L225 Difference]: With dead ends: 1748 [2021-02-19 20:43:07,224 INFO L226 Difference]: Without dead ends: 1748 [2021-02-19 20:43:07,225 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:43:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-02-19 20:43:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-02-19 20:43:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-02-19 20:43:07,288 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-02-19 20:43:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:07,289 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-02-19 20:43:07,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-02-19 20:43:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:43:07,294 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:07,295 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:07,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:07,517 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:07,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1442981975, now seen corresponding path program 1 times [2021-02-19 20:43:07,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:07,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446378133] [2021-02-19 20:43:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:07,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446378133] [2021-02-19 20:43:07,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:43:07,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:43:07,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148160741] [2021-02-19 20:43:07,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:43:07,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:07,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:43:07,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:07,569 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:07,643 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-02-19 20:43:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:43:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2021-02-19 20:43:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:07,652 INFO L225 Difference]: With dead ends: 997 [2021-02-19 20:43:07,652 INFO L226 Difference]: Without dead ends: 884 [2021-02-19 20:43:07,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-02-19 20:43:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-02-19 20:43:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-02-19 20:43:07,694 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-02-19 20:43:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:07,695 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-02-19 20:43:07,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-02-19 20:43:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:43:07,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:07,699 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:07,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 20:43:07,699 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1893716055, now seen corresponding path program 2 times [2021-02-19 20:43:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:07,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780969545] [2021-02-19 20:43:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:07,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780969545] [2021-02-19 20:43:07,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:43:07,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:43:07,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225674426] [2021-02-19 20:43:07,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:43:07,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:43:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:07,755 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:07,806 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-02-19 20:43:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:43:07,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2021-02-19 20:43:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:07,814 INFO L225 Difference]: With dead ends: 949 [2021-02-19 20:43:07,815 INFO L226 Difference]: Without dead ends: 949 [2021-02-19 20:43:07,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-02-19 20:43:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-02-19 20:43:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-02-19 20:43:07,849 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-02-19 20:43:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:07,849 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-02-19 20:43:07,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-02-19 20:43:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:07,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:07,856 INFO L506 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, 1] [2021-02-19 20:43:07,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 20:43:07,856 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1262316247, now seen corresponding path program 1 times [2021-02-19 20:43:07,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:07,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099211360] [2021-02-19 20:43:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:07,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099211360] [2021-02-19 20:43:07,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432200484] [2021-02-19 20:43:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 20:43:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:43:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:08,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:08,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-02-19 20:43:08,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794365352] [2021-02-19 20:43:08,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:43:08,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:08,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:43:08,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:43:08,050 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:08,193 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-02-19 20:43:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:43:08,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:08,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:08,204 INFO L225 Difference]: With dead ends: 1389 [2021-02-19 20:43:08,205 INFO L226 Difference]: Without dead ends: 1389 [2021-02-19 20:43:08,205 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:43:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-02-19 20:43:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-02-19 20:43:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-02-19 20:43:08,249 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-02-19 20:43:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:08,249 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-02-19 20:43:08,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-02-19 20:43:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:08,253 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:08,253 INFO L506 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, 1] [2021-02-19 20:43:08,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:08,469 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:08,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1933530281, now seen corresponding path program 1 times [2021-02-19 20:43:08,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:08,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115307619] [2021-02-19 20:43:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:08,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115307619] [2021-02-19 20:43:08,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364145080] [2021-02-19 20:43:08,565 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:08,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:08,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:08,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:08,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:08,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596215367] [2021-02-19 20:43:08,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:08,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:08,699 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:08,834 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-02-19 20:43:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:08,848 INFO L225 Difference]: With dead ends: 1781 [2021-02-19 20:43:08,848 INFO L226 Difference]: Without dead ends: 1738 [2021-02-19 20:43:08,849 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-02-19 20:43:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-02-19 20:43:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-02-19 20:43:08,912 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-02-19 20:43:08,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:08,913 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-02-19 20:43:08,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-02-19 20:43:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:08,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:08,917 INFO L506 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, 1] [2021-02-19 20:43:09,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:09,134 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:09,135 INFO L82 PathProgramCache]: Analyzing trace with hash 851540705, now seen corresponding path program 2 times [2021-02-19 20:43:09,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:09,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461719676] [2021-02-19 20:43:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:09,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461719676] [2021-02-19 20:43:09,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440092660] [2021-02-19 20:43:09,217 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:09,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:09,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:09,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:09,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123048513] [2021-02-19 20:43:09,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:09,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:09,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:09,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:09,334 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:09,408 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-02-19 20:43:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:09,423 INFO L225 Difference]: With dead ends: 1504 [2021-02-19 20:43:09,424 INFO L226 Difference]: Without dead ends: 1461 [2021-02-19 20:43:09,424 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-02-19 20:43:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-02-19 20:43:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-02-19 20:43:09,479 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-02-19 20:43:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:09,479 INFO L480 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-02-19 20:43:09,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-02-19 20:43:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:09,486 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:09,486 INFO L506 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, 1] [2021-02-19 20:43:09,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:09,702 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:09,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1339757397, now seen corresponding path program 3 times [2021-02-19 20:43:09,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:09,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436957999] [2021-02-19 20:43:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436957999] [2021-02-19 20:43:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931071193] [2021-02-19 20:43:09,771 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:09,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:43:09,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:09,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:09,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:09,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:09,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040852727] [2021-02-19 20:43:09,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:09,884 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:09,956 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-02-19 20:43:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:09,982 INFO L225 Difference]: With dead ends: 1444 [2021-02-19 20:43:09,982 INFO L226 Difference]: Without dead ends: 1401 [2021-02-19 20:43:09,983 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-02-19 20:43:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-02-19 20:43:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-02-19 20:43:10,041 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-02-19 20:43:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:10,042 INFO L480 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-02-19 20:43:10,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-02-19 20:43:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:10,050 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:10,050 INFO L506 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, 1] [2021-02-19 20:43:10,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:10,278 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:10,279 INFO L82 PathProgramCache]: Analyzing trace with hash -405974823, now seen corresponding path program 1 times [2021-02-19 20:43:10,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:10,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312779609] [2021-02-19 20:43:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:10,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312779609] [2021-02-19 20:43:10,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384919588] [2021-02-19 20:43:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:10,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:10,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:10,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:10,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185308363] [2021-02-19 20:43:10,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:10,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:10,457 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:10,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:10,541 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-02-19 20:43:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:10,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:10,584 INFO L225 Difference]: With dead ends: 2517 [2021-02-19 20:43:10,584 INFO L226 Difference]: Without dead ends: 2474 [2021-02-19 20:43:10,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-02-19 20:43:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-02-19 20:43:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-02-19 20:43:10,663 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-02-19 20:43:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:10,663 INFO L480 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-02-19 20:43:10,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-02-19 20:43:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:10,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:10,669 INFO L506 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, 1] [2021-02-19 20:43:10,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 20:43:10,885 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:10,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1865135599, now seen corresponding path program 2 times [2021-02-19 20:43:10,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:10,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016840027] [2021-02-19 20:43:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:10,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016840027] [2021-02-19 20:43:10,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669469203] [2021-02-19 20:43:10,963 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 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 [2021-02-19 20:43:11,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:11,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:11,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:11,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:11,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:11,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:11,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344512745] [2021-02-19 20:43:11,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:11,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:11,110 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:11,201 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-02-19 20:43:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:11,216 INFO L225 Difference]: With dead ends: 2128 [2021-02-19 20:43:11,216 INFO L226 Difference]: Without dead ends: 2085 [2021-02-19 20:43:11,217 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-02-19 20:43:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-02-19 20:43:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-02-19 20:43:11,288 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-02-19 20:43:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:11,288 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-02-19 20:43:11,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-02-19 20:43:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:11,296 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:11,297 INFO L506 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, 1] [2021-02-19 20:43:11,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 20:43:11,514 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:11,515 INFO L82 PathProgramCache]: Analyzing trace with hash 658235137, now seen corresponding path program 3 times [2021-02-19 20:43:11,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:11,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564357769] [2021-02-19 20:43:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:11,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564357769] [2021-02-19 20:43:11,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182439650] [2021-02-19 20:43:11,577 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:11,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:43:11,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:11,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:11,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:11,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:11,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169697651] [2021-02-19 20:43:11,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:11,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:11,680 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:11,768 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-02-19 20:43:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:11,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:11,781 INFO L225 Difference]: With dead ends: 2247 [2021-02-19 20:43:11,781 INFO L226 Difference]: Without dead ends: 2204 [2021-02-19 20:43:11,782 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-02-19 20:43:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-02-19 20:43:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-02-19 20:43:11,853 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-02-19 20:43:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:11,854 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-02-19 20:43:11,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-02-19 20:43:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:11,861 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:11,862 INFO L506 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, 1] [2021-02-19 20:43:12,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:12,090 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:12,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:12,091 INFO L82 PathProgramCache]: Analyzing trace with hash -712871591, now seen corresponding path program 1 times [2021-02-19 20:43:12,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:12,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209948855] [2021-02-19 20:43:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:12,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209948855] [2021-02-19 20:43:12,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:43:12,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:43:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132447797] [2021-02-19 20:43:12,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:43:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:43:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:43:12,138 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:12,182 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-02-19 20:43:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:43:12,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:12,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:12,191 INFO L225 Difference]: With dead ends: 1413 [2021-02-19 20:43:12,191 INFO L226 Difference]: Without dead ends: 1413 [2021-02-19 20:43:12,191 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:43:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-02-19 20:43:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-02-19 20:43:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-02-19 20:43:12,252 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-02-19 20:43:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:12,253 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-02-19 20:43:12,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-02-19 20:43:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:12,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:12,260 INFO L506 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, 1] [2021-02-19 20:43:12,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 20:43:12,261 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2073399513, now seen corresponding path program 4 times [2021-02-19 20:43:12,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:12,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915417202] [2021-02-19 20:43:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:12,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915417202] [2021-02-19 20:43:12,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760171191] [2021-02-19 20:43:12,370 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:12,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:43:12,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:12,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:12,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:12,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775200497] [2021-02-19 20:43:12,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:12,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:12,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:12,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:12,486 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:12,579 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-02-19 20:43:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:12,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:12,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:12,597 INFO L225 Difference]: With dead ends: 2930 [2021-02-19 20:43:12,598 INFO L226 Difference]: Without dead ends: 2887 [2021-02-19 20:43:12,598 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-02-19 20:43:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-02-19 20:43:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-02-19 20:43:12,691 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-02-19 20:43:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:12,691 INFO L480 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-02-19 20:43:12,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-02-19 20:43:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:12,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:12,700 INFO L506 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, 1] [2021-02-19 20:43:12,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:12,919 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -461514843, now seen corresponding path program 5 times [2021-02-19 20:43:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:12,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380671829] [2021-02-19 20:43:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:12,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380671829] [2021-02-19 20:43:12,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434467928] [2021-02-19 20:43:12,995 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:13,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:43:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:13,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:13,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:13,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086383115] [2021-02-19 20:43:13,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:13,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:13,119 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:13,203 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-02-19 20:43:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:13,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:13,219 INFO L225 Difference]: With dead ends: 2434 [2021-02-19 20:43:13,219 INFO L226 Difference]: Without dead ends: 2391 [2021-02-19 20:43:13,222 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-02-19 20:43:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-02-19 20:43:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-02-19 20:43:13,294 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-02-19 20:43:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:13,295 INFO L480 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-02-19 20:43:13,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-02-19 20:43:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:13,302 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:13,302 INFO L506 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, 1] [2021-02-19 20:43:13,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 20:43:13,518 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2061855893, now seen corresponding path program 6 times [2021-02-19 20:43:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:13,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050929633] [2021-02-19 20:43:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050929633] [2021-02-19 20:43:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251013554] [2021-02-19 20:43:13,589 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:13,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 20:43:13,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:13,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:13,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 20:43:13,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632290419] [2021-02-19 20:43:13,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:13,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:13,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:13,724 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:13,851 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-02-19 20:43:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:43:13,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:13,865 INFO L225 Difference]: With dead ends: 2600 [2021-02-19 20:43:13,865 INFO L226 Difference]: Without dead ends: 2557 [2021-02-19 20:43:13,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:43:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-02-19 20:43:13,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-02-19 20:43:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-02-19 20:43:13,948 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-02-19 20:43:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:13,948 INFO L480 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-02-19 20:43:13,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-02-19 20:43:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:13,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:13,957 INFO L506 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, 1] [2021-02-19 20:43:14,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 20:43:14,178 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash -94338727, now seen corresponding path program 2 times [2021-02-19 20:43:14,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:14,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032107671] [2021-02-19 20:43:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:14,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032107671] [2021-02-19 20:43:14,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:43:14,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:43:14,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172880021] [2021-02-19 20:43:14,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:43:14,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:14,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:43:14,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:14,219 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:14,307 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-02-19 20:43:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:43:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:14,319 INFO L225 Difference]: With dead ends: 1899 [2021-02-19 20:43:14,320 INFO L226 Difference]: Without dead ends: 1866 [2021-02-19 20:43:14,320 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-02-19 20:43:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-02-19 20:43:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-02-19 20:43:14,392 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-02-19 20:43:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:14,392 INFO L480 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-02-19 20:43:14,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-02-19 20:43:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:14,400 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:14,400 INFO L506 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, 1] [2021-02-19 20:43:14,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-19 20:43:14,400 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1465674909, now seen corresponding path program 2 times [2021-02-19 20:43:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:14,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989741531] [2021-02-19 20:43:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:14,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989741531] [2021-02-19 20:43:14,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428547924] [2021-02-19 20:43:14,447 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:14,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:43:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:14,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:14,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-02-19 20:43:14,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221165171] [2021-02-19 20:43:14,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:14,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:14,565 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:14,766 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-02-19 20:43:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:43:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:14,787 INFO L225 Difference]: With dead ends: 3584 [2021-02-19 20:43:14,788 INFO L226 Difference]: Without dead ends: 3584 [2021-02-19 20:43:14,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:43:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-02-19 20:43:14,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-02-19 20:43:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-02-19 20:43:14,894 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-02-19 20:43:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:14,894 INFO L480 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-02-19 20:43:14,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-02-19 20:43:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:14,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:14,904 INFO L506 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, 1] [2021-02-19 20:43:15,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 20:43:15,121 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash 15949653, now seen corresponding path program 3 times [2021-02-19 20:43:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:15,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619054676] [2021-02-19 20:43:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:15,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619054676] [2021-02-19 20:43:15,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602453277] [2021-02-19 20:43:15,146 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:15,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:43:15,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:43:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:15,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:15,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-02-19 20:43:15,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219675944] [2021-02-19 20:43:15,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:15,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:15,271 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:15,560 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-02-19 20:43:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:43:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:15,580 INFO L225 Difference]: With dead ends: 4126 [2021-02-19 20:43:15,581 INFO L226 Difference]: Without dead ends: 4126 [2021-02-19 20:43:15,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:43:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-02-19 20:43:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-02-19 20:43:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-02-19 20:43:15,746 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-02-19 20:43:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:15,746 INFO L480 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-02-19 20:43:15,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-02-19 20:43:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:15,755 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:15,755 INFO L506 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, 1] [2021-02-19 20:43:15,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:15,970 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash 943838037, now seen corresponding path program 4 times [2021-02-19 20:43:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:15,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847875771] [2021-02-19 20:43:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:16,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847875771] [2021-02-19 20:43:16,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394959966] [2021-02-19 20:43:16,033 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:16,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:43:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:16,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:16,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:16,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219777837] [2021-02-19 20:43:16,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:16,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:16,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:16,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:16,136 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:16,240 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-02-19 20:43:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:16,253 INFO L225 Difference]: With dead ends: 2707 [2021-02-19 20:43:16,253 INFO L226 Difference]: Without dead ends: 2643 [2021-02-19 20:43:16,254 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-02-19 20:43:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-02-19 20:43:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-02-19 20:43:16,346 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-02-19 20:43:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:16,348 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-02-19 20:43:16,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-02-19 20:43:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:16,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:16,356 INFO L506 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, 1] [2021-02-19 20:43:16,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:16,582 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:16,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1432054729, now seen corresponding path program 5 times [2021-02-19 20:43:16,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:16,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934072036] [2021-02-19 20:43:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934072036] [2021-02-19 20:43:16,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522494760] [2021-02-19 20:43:16,638 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:16,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:43:16,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:16,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:16,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:16,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:16,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401473200] [2021-02-19 20:43:16,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:16,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:16,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:16,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:16,745 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:16,830 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-02-19 20:43:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:16,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:16,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:16,844 INFO L225 Difference]: With dead ends: 2722 [2021-02-19 20:43:16,844 INFO L226 Difference]: Without dead ends: 2658 [2021-02-19 20:43:16,845 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-02-19 20:43:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-02-19 20:43:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-02-19 20:43:16,941 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-02-19 20:43:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:16,941 INFO L480 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-02-19 20:43:16,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-02-19 20:43:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:16,951 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:16,952 INFO L506 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, 1] [2021-02-19 20:43:17,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:17,166 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:17,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1404343011, now seen corresponding path program 6 times [2021-02-19 20:43:17,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:17,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427488019] [2021-02-19 20:43:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:17,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427488019] [2021-02-19 20:43:17,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128651696] [2021-02-19 20:43:17,223 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:17,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:43:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:43:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:17,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:17,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:43:17,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256666485] [2021-02-19 20:43:17,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:43:17,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:43:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:17,312 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:17,420 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-02-19 20:43:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:43:17,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:17,431 INFO L225 Difference]: With dead ends: 3086 [2021-02-19 20:43:17,431 INFO L226 Difference]: Without dead ends: 3022 [2021-02-19 20:43:17,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:43:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-02-19 20:43:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-02-19 20:43:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-02-19 20:43:17,521 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-02-19 20:43:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:17,521 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-02-19 20:43:17,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-02-19 20:43:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:17,532 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:17,532 INFO L506 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, 1] [2021-02-19 20:43:17,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 20:43:17,758 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1402932067, now seen corresponding path program 3 times [2021-02-19 20:43:17,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:17,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451758253] [2021-02-19 20:43:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:43:17,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451758253] [2021-02-19 20:43:17,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:43:17,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:43:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591192222] [2021-02-19 20:43:17,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:43:17,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:43:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:17,785 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:17,840 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-02-19 20:43:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:43:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:17,847 INFO L225 Difference]: With dead ends: 2525 [2021-02-19 20:43:17,847 INFO L226 Difference]: Without dead ends: 2525 [2021-02-19 20:43:17,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:43:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-02-19 20:43:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-02-19 20:43:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-02-19 20:43:17,921 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-02-19 20:43:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:17,921 INFO L480 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-02-19 20:43:17,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-02-19 20:43:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:17,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:17,934 INFO L506 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, 1] [2021-02-19 20:43:17,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-19 20:43:17,934 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1833157475, now seen corresponding path program 4 times [2021-02-19 20:43:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:17,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114398037] [2021-02-19 20:43:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:17,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114398037] [2021-02-19 20:43:17,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287479433] [2021-02-19 20:43:17,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:43:18,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:43:18,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:18,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:43:18,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:18,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:18,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-02-19 20:43:18,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667475734] [2021-02-19 20:43:18,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:43:18,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:43:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:43:18,077 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 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) [2021-02-19 20:43:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:18,215 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-02-19 20:43:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:43:18,215 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 23 [2021-02-19 20:43:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:18,227 INFO L225 Difference]: With dead ends: 3537 [2021-02-19 20:43:18,228 INFO L226 Difference]: Without dead ends: 3537 [2021-02-19 20:43:18,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:43:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-02-19 20:43:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-02-19 20:43:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-02-19 20:43:18,327 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-02-19 20:43:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:18,328 INFO L480 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-02-19 20:43:18,328 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) [2021-02-19 20:43:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-02-19 20:43:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:18,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:18,341 INFO L506 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, 1] [2021-02-19 20:43:18,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 20:43:18,554 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1684970339, now seen corresponding path program 5 times [2021-02-19 20:43:18,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:18,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671682588] [2021-02-19 20:43:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671682588] [2021-02-19 20:43:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610483871] [2021-02-19 20:43:18,581 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:18,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:43:18,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:18,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:43:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:18,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:18,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-02-19 20:43:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825345627] [2021-02-19 20:43:18,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:18,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:18,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:18,669 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:18,874 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-02-19 20:43:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:43:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:18,894 INFO L225 Difference]: With dead ends: 5435 [2021-02-19 20:43:18,894 INFO L226 Difference]: Without dead ends: 5435 [2021-02-19 20:43:18,894 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:43:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-02-19 20:43:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-02-19 20:43:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-02-19 20:43:19,075 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-02-19 20:43:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:19,075 INFO L480 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-02-19 20:43:19,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-02-19 20:43:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:43:19,091 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:19,091 INFO L506 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, 1] [2021-02-19 20:43:19,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 20:43:19,318 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:19,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1615076775, now seen corresponding path program 6 times [2021-02-19 20:43:19,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:19,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678839841] [2021-02-19 20:43:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:19,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678839841] [2021-02-19 20:43:19,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529074797] [2021-02-19 20:43:19,341 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 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 [2021-02-19 20:43:19,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 20:43:19,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:43:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:19,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:19,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-02-19 20:43:19,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356521918] [2021-02-19 20:43:19,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:19,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:19,458 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:19,778 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-02-19 20:43:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:43:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:43:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:19,816 INFO L225 Difference]: With dead ends: 6635 [2021-02-19 20:43:19,816 INFO L226 Difference]: Without dead ends: 6635 [2021-02-19 20:43:19,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:43:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-02-19 20:43:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-02-19 20:43:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-02-19 20:43:19,988 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-02-19 20:43:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:19,989 INFO L480 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-02-19 20:43:19,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-02-19 20:43:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:20,008 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:20,008 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:20,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 20:43:20,222 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:20,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1660033877, now seen corresponding path program 7 times [2021-02-19 20:43:20,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:20,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668980127] [2021-02-19 20:43:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668980127] [2021-02-19 20:43:20,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519657078] [2021-02-19 20:43:20,266 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:20,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:43:20,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:20,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:20,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 20:43:20,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189245748] [2021-02-19 20:43:20,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:43:20,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:20,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:43:20,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:43:20,432 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:20,664 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-02-19 20:43:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:43:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:20,692 INFO L225 Difference]: With dead ends: 8080 [2021-02-19 20:43:20,693 INFO L226 Difference]: Without dead ends: 7806 [2021-02-19 20:43:20,693 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:43:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-02-19 20:43:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-02-19 20:43:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-02-19 20:43:20,910 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-02-19 20:43:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:20,910 INFO L480 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-02-19 20:43:20,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-02-19 20:43:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:20,926 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:20,927 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:21,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 20:43:21,128 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1324731559, now seen corresponding path program 4 times [2021-02-19 20:43:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148602312] [2021-02-19 20:43:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148602312] [2021-02-19 20:43:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312050218] [2021-02-19 20:43:21,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:21,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:43:21,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:43:21,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:21,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:21,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:43:21,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432851776] [2021-02-19 20:43:21,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:21,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:21,314 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:21,511 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-02-19 20:43:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:43:21,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:21,550 INFO L225 Difference]: With dead ends: 7686 [2021-02-19 20:43:21,550 INFO L226 Difference]: Without dead ends: 7610 [2021-02-19 20:43:21,550 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-02-19 20:43:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-02-19 20:43:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-02-19 20:43:21,827 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-02-19 20:43:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:21,827 INFO L480 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-02-19 20:43:21,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-02-19 20:43:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:21,848 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:21,848 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:22,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:22,062 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash -225610791, now seen corresponding path program 1 times [2021-02-19 20:43:22,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:22,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096621725] [2021-02-19 20:43:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:22,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096621725] [2021-02-19 20:43:22,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027890432] [2021-02-19 20:43:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-02-19 20:43:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:43:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:22,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:22,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 20:43:22,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942546720] [2021-02-19 20:43:22,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:43:22,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:43:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:43:22,229 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:22,652 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-02-19 20:43:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:43:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-02-19 20:43:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:22,734 INFO L225 Difference]: With dead ends: 13992 [2021-02-19 20:43:22,734 INFO L226 Difference]: Without dead ends: 13926 [2021-02-19 20:43:22,735 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:43:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-02-19 20:43:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-02-19 20:43:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-02-19 20:43:23,075 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-02-19 20:43:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:23,075 INFO L480 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-02-19 20:43:23,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-02-19 20:43:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:23,093 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:23,093 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:23,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 20:43:23,294 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash -155717227, now seen corresponding path program 2 times [2021-02-19 20:43:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:23,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123034710] [2021-02-19 20:43:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:23,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123034710] [2021-02-19 20:43:23,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584255095] [2021-02-19 20:43:23,405 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 [2021-02-19 20:43:23,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:23,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:43:23,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:23,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:23,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 20:43:23,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413299796] [2021-02-19 20:43:23,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:43:23,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:43:23,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:43:23,586 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:24,146 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-02-19 20:43:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:43:24,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-02-19 20:43:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:24,231 INFO L225 Difference]: With dead ends: 12594 [2021-02-19 20:43:24,231 INFO L226 Difference]: Without dead ends: 12594 [2021-02-19 20:43:24,232 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:43:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-02-19 20:43:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-02-19 20:43:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-02-19 20:43:24,525 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-02-19 20:43:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:24,525 INFO L480 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-02-19 20:43:24,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-02-19 20:43:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:24,553 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:24,553 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:24,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:24,754 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:24,754 INFO L82 PathProgramCache]: Analyzing trace with hash -494357219, now seen corresponding path program 3 times [2021-02-19 20:43:24,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:24,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696399860] [2021-02-19 20:43:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:24,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696399860] [2021-02-19 20:43:24,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698685025] [2021-02-19 20:43:24,816 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:43:24,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:43:24,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:43:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:25,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:25,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-02-19 20:43:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623463202] [2021-02-19 20:43:25,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 20:43:25,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 20:43:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:43:25,063 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-02-19 20:43:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:26,013 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-02-19 20:43:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:43:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-02-19 20:43:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:26,323 INFO L225 Difference]: With dead ends: 29971 [2021-02-19 20:43:26,323 INFO L226 Difference]: Without dead ends: 29848 [2021-02-19 20:43:26,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:43:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-02-19 20:43:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-02-19 20:43:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-02-19 20:43:27,081 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-02-19 20:43:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:27,081 INFO L480 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-02-19 20:43:27,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-02-19 20:43:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-02-19 20:43:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:27,265 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:27,265 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:27,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 20:43:27,470 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash -277329229, now seen corresponding path program 4 times [2021-02-19 20:43:27,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:27,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846630059] [2021-02-19 20:43:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:27,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846630059] [2021-02-19 20:43:27,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636030136] [2021-02-19 20:43:27,545 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:27,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:43:27,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:27,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:43:27,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:27,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:27,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-02-19 20:43:27,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140282731] [2021-02-19 20:43:27,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:43:27,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:43:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:43:27,654 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:28,469 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-02-19 20:43:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:43:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:28,633 INFO L225 Difference]: With dead ends: 31001 [2021-02-19 20:43:28,633 INFO L226 Difference]: Without dead ends: 30851 [2021-02-19 20:43:28,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:43:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-02-19 20:43:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-02-19 20:43:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-02-19 20:43:29,682 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-02-19 20:43:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:29,683 INFO L480 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-02-19 20:43:29,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-02-19 20:43:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:29,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:29,764 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:29,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:29,990 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1342979691, now seen corresponding path program 5 times [2021-02-19 20:43:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:29,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862558180] [2021-02-19 20:43:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:30,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862558180] [2021-02-19 20:43:30,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124917049] [2021-02-19 20:43:30,070 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 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 [2021-02-19 20:43:30,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:30,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:43:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:30,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:30,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 20:43:30,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757385217] [2021-02-19 20:43:30,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:43:30,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:30,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:43:30,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:43:30,256 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:30,861 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-02-19 20:43:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:43:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-02-19 20:43:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:31,008 INFO L225 Difference]: With dead ends: 27651 [2021-02-19 20:43:31,009 INFO L226 Difference]: Without dead ends: 27523 [2021-02-19 20:43:31,009 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:43:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-02-19 20:43:31,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-02-19 20:43:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-02-19 20:43:31,946 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-02-19 20:43:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:31,947 INFO L480 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-02-19 20:43:31,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-02-19 20:43:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:32,043 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:32,043 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:32,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 20:43:32,246 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:32,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1723134229, now seen corresponding path program 6 times [2021-02-19 20:43:32,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:32,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785614803] [2021-02-19 20:43:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:32,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785614803] [2021-02-19 20:43:32,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602090465] [2021-02-19 20:43:32,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:32,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:43:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:43:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:32,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:32,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 20:43:32,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386701632] [2021-02-19 20:43:32,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:43:32,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:32,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:43:32,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:43:32,450 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:32,951 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-02-19 20:43:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:43:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:33,037 INFO L225 Difference]: With dead ends: 22500 [2021-02-19 20:43:33,037 INFO L226 Difference]: Without dead ends: 22316 [2021-02-19 20:43:33,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:43:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-02-19 20:43:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-02-19 20:43:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-02-19 20:43:33,785 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-02-19 20:43:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:33,785 INFO L480 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-02-19 20:43:33,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-02-19 20:43:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:33,842 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:33,842 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:34,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 20:43:34,043 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1042553895, now seen corresponding path program 7 times [2021-02-19 20:43:34,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:34,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361401569] [2021-02-19 20:43:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361401569] [2021-02-19 20:43:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449957924] [2021-02-19 20:43:34,095 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:43:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:34,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:34,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-02-19 20:43:34,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584315402] [2021-02-19 20:43:34,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 20:43:34,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 20:43:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:43:34,271 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-02-19 20:43:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:35,492 INFO L93 Difference]: Finished difference Result 72723 states and 315638 transitions. [2021-02-19 20:43:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:43:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-02-19 20:43:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:35,877 INFO L225 Difference]: With dead ends: 72723 [2021-02-19 20:43:35,877 INFO L226 Difference]: Without dead ends: 72477 [2021-02-19 20:43:35,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:43:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72477 states. [2021-02-19 20:43:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72477 to 44928. [2021-02-19 20:43:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44928 states, 44927 states have (on average 4.539052240300933) internal successors, (203926), 44927 states have internal predecessors, (203926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44928 states to 44928 states and 203926 transitions. [2021-02-19 20:43:38,258 INFO L78 Accepts]: Start accepts. Automaton has 44928 states and 203926 transitions. Word has length 25 [2021-02-19 20:43:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:38,258 INFO L480 AbstractCegarLoop]: Abstraction has 44928 states and 203926 transitions. [2021-02-19 20:43:38,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-02-19 20:43:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 44928 states and 203926 transitions. [2021-02-19 20:43:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:38,377 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:38,377 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:38,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 20:43:38,578 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:38,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1106242641, now seen corresponding path program 8 times [2021-02-19 20:43:38,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:38,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245715727] [2021-02-19 20:43:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:38,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245715727] [2021-02-19 20:43:38,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497960350] [2021-02-19 20:43:38,665 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:43:38,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:38,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:38,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:38,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:38,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 20:43:38,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637512495] [2021-02-19 20:43:38,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:43:38,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:43:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:43:38,802 INFO L87 Difference]: Start difference. First operand 44928 states and 203926 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:39,803 INFO L93 Difference]: Finished difference Result 45875 states and 207187 transitions. [2021-02-19 20:43:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:43:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:40,027 INFO L225 Difference]: With dead ends: 45875 [2021-02-19 20:43:40,027 INFO L226 Difference]: Without dead ends: 45705 [2021-02-19 20:43:40,027 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:43:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45705 states. [2021-02-19 20:43:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45705 to 44959. [2021-02-19 20:43:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44959 states, 44958 states have (on average 4.537568397170693) internal successors, (204000), 44958 states have internal predecessors, (204000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44959 states to 44959 states and 204000 transitions. [2021-02-19 20:43:41,738 INFO L78 Accepts]: Start accepts. Automaton has 44959 states and 204000 transitions. Word has length 25 [2021-02-19 20:43:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:41,738 INFO L480 AbstractCegarLoop]: Abstraction has 44959 states and 204000 transitions. [2021-02-19 20:43:41,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 44959 states and 204000 transitions. [2021-02-19 20:43:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:41,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:41,868 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:42,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:42,068 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -230350119, now seen corresponding path program 1 times [2021-02-19 20:43:42,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:42,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781179833] [2021-02-19 20:43:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781179833] [2021-02-19 20:43:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254075560] [2021-02-19 20:43:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:43:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:42,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:42,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 20:43:42,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393527977] [2021-02-19 20:43:42,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:43:42,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:43:42,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:43:42,668 INFO L87 Difference]: Start difference. First operand 44959 states and 204000 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:43,335 INFO L93 Difference]: Finished difference Result 49005 states and 219986 transitions. [2021-02-19 20:43:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:43:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 25 [2021-02-19 20:43:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:43,605 INFO L225 Difference]: With dead ends: 49005 [2021-02-19 20:43:43,606 INFO L226 Difference]: Without dead ends: 48987 [2021-02-19 20:43:43,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:43:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48987 states. [2021-02-19 20:43:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48987 to 45643. [2021-02-19 20:43:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45643 states, 45642 states have (on average 4.534726786731519) internal successors, (206974), 45642 states have internal predecessors, (206974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45643 states to 45643 states and 206974 transitions. [2021-02-19 20:43:45,515 INFO L78 Accepts]: Start accepts. Automaton has 45643 states and 206974 transitions. Word has length 25 [2021-02-19 20:43:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:45,515 INFO L480 AbstractCegarLoop]: Abstraction has 45643 states and 206974 transitions. [2021-02-19 20:43:45,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 45643 states and 206974 transitions. [2021-02-19 20:43:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:45,654 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:45,654 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:45,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 20:43:45,855 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash 220383961, now seen corresponding path program 2 times [2021-02-19 20:43:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:45,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307664007] [2021-02-19 20:43:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:45,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307664007] [2021-02-19 20:43:45,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144927384] [2021-02-19 20:43:45,894 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:45,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:43:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:46,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:46,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 20:43:46,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655518974] [2021-02-19 20:43:46,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:43:46,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:46,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:43:46,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:43:46,016 INFO L87 Difference]: Start difference. First operand 45643 states and 206974 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:47,024 INFO L93 Difference]: Finished difference Result 52382 states and 233498 transitions. [2021-02-19 20:43:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:43:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:47,314 INFO L225 Difference]: With dead ends: 52382 [2021-02-19 20:43:47,315 INFO L226 Difference]: Without dead ends: 52382 [2021-02-19 20:43:47,315 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:43:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52382 states. [2021-02-19 20:43:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52382 to 45586. [2021-02-19 20:43:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45586 states, 45585 states have (on average 4.529231106723703) internal successors, (206465), 45585 states have internal predecessors, (206465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45586 states to 45586 states and 206465 transitions. [2021-02-19 20:43:48,990 INFO L78 Accepts]: Start accepts. Automaton has 45586 states and 206465 transitions. Word has length 25 [2021-02-19 20:43:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:48,990 INFO L480 AbstractCegarLoop]: Abstraction has 45586 states and 206465 transitions. [2021-02-19 20:43:48,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 45586 states and 206465 transitions. [2021-02-19 20:43:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:49,106 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:49,106 INFO L506 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, 1, 1, 1] [2021-02-19 20:43:49,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 20:43:49,314 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:49,314 INFO L82 PathProgramCache]: Analyzing trace with hash 597222549, now seen corresponding path program 3 times [2021-02-19 20:43:49,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:49,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519801144] [2021-02-19 20:43:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:49,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519801144] [2021-02-19 20:43:49,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000044916] [2021-02-19 20:43:49,352 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:49,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:43:49,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:43:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:49,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:43:49,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-02-19 20:43:49,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067270961] [2021-02-19 20:43:49,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:43:49,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:49,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:43:49,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:43:49,471 INFO L87 Difference]: Start difference. First operand 45586 states and 206465 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:50,652 INFO L93 Difference]: Finished difference Result 57895 states and 256438 transitions. [2021-02-19 20:43:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:43:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:51,001 INFO L225 Difference]: With dead ends: 57895 [2021-02-19 20:43:51,001 INFO L226 Difference]: Without dead ends: 57813 [2021-02-19 20:43:51,001 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:43:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57813 states. [2021-02-19 20:43:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57813 to 48438. [2021-02-19 20:43:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48438 states, 48437 states have (on average 4.527179635402688) internal successors, (219283), 48437 states have internal predecessors, (219283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48438 states to 48438 states and 219283 transitions. [2021-02-19 20:43:53,090 INFO L78 Accepts]: Start accepts. Automaton has 48438 states and 219283 transitions. Word has length 25 [2021-02-19 20:43:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:53,090 INFO L480 AbstractCegarLoop]: Abstraction has 48438 states and 219283 transitions. [2021-02-19 20:43:53,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48438 states and 219283 transitions. [2021-02-19 20:43:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:53,251 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:53,251 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:53,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:43:53,452 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash 699611355, now seen corresponding path program 5 times [2021-02-19 20:43:53,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:53,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101841482] [2021-02-19 20:43:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:53,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101841482] [2021-02-19 20:43:53,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908706804] [2021-02-19 20:43:53,517 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 [2021-02-19 20:43:53,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:43:53,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:53,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:43:53,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:53,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:53,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:43:53,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766376232] [2021-02-19 20:43:53,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:53,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:53,591 INFO L87 Difference]: Start difference. First operand 48438 states and 219283 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:54,725 INFO L93 Difference]: Finished difference Result 50929 states and 229156 transitions. [2021-02-19 20:43:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:43:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:55,022 INFO L225 Difference]: With dead ends: 50929 [2021-02-19 20:43:55,023 INFO L226 Difference]: Without dead ends: 50853 [2021-02-19 20:43:55,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50853 states. [2021-02-19 20:43:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50853 to 48508. [2021-02-19 20:43:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48508 states, 48507 states have (on average 4.528872121549467) internal successors, (219682), 48507 states have internal predecessors, (219682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48508 states to 48508 states and 219682 transitions. [2021-02-19 20:43:57,081 INFO L78 Accepts]: Start accepts. Automaton has 48508 states and 219682 transitions. Word has length 25 [2021-02-19 20:43:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:43:57,081 INFO L480 AbstractCegarLoop]: Abstraction has 48508 states and 219682 transitions. [2021-02-19 20:43:57,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 48508 states and 219682 transitions. [2021-02-19 20:43:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:43:57,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:43:57,230 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:43:57,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-02-19 20:43:57,431 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:43:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:43:57,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1141988137, now seen corresponding path program 6 times [2021-02-19 20:43:57,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:43:57,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642341848] [2021-02-19 20:43:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:43:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:43:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:57,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642341848] [2021-02-19 20:43:57,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227412549] [2021-02-19 20:43:57,527 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 [2021-02-19 20:43:57,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 20:43:57,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:43:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:43:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:43:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:43:57,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:43:57,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:43:57,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029456593] [2021-02-19 20:43:57,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:43:57,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:43:57,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:43:57,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:57,619 INFO L87 Difference]: Start difference. First operand 48508 states and 219682 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:43:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:43:58,111 INFO L93 Difference]: Finished difference Result 51004 states and 229666 transitions. [2021-02-19 20:43:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:43:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:43:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:43:58,394 INFO L225 Difference]: With dead ends: 51004 [2021-02-19 20:43:58,394 INFO L226 Difference]: Without dead ends: 50928 [2021-02-19 20:43:58,395 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:43:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50928 states. [2021-02-19 20:44:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50928 to 48683. [2021-02-19 20:44:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48683 states, 48682 states have (on average 4.53103816605727) internal successors, (220580), 48682 states have internal predecessors, (220580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48683 states to 48683 states and 220580 transitions. [2021-02-19 20:44:01,031 INFO L78 Accepts]: Start accepts. Automaton has 48683 states and 220580 transitions. Word has length 25 [2021-02-19 20:44:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:01,031 INFO L480 AbstractCegarLoop]: Abstraction has 48683 states and 220580 transitions. [2021-02-19 20:44:01,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 48683 states and 220580 transitions. [2021-02-19 20:44:01,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:01,222 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:01,222 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:44:01,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:01,423 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:01,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1455447913, now seen corresponding path program 7 times [2021-02-19 20:44:01,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:01,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472827562] [2021-02-19 20:44:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:01,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472827562] [2021-02-19 20:44:01,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898917661] [2021-02-19 20:44:01,517 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) [2021-02-19 20:44:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:01,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:44:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:01,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:01,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:44:01,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368344346] [2021-02-19 20:44:01,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:44:01,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:44:01,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:44:01,614 INFO L87 Difference]: Start difference. First operand 48683 states and 220580 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:02,149 INFO L93 Difference]: Finished difference Result 50388 states and 227448 transitions. [2021-02-19 20:44:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:44:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:44:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:02,443 INFO L225 Difference]: With dead ends: 50388 [2021-02-19 20:44:02,443 INFO L226 Difference]: Without dead ends: 50312 [2021-02-19 20:44:02,444 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:44:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50312 states. [2021-02-19 20:44:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50312 to 48763. [2021-02-19 20:44:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48763 states, 48762 states have (on average 4.531930601698043) internal successors, (220986), 48762 states have internal predecessors, (220986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48763 states to 48763 states and 220986 transitions. [2021-02-19 20:44:04,204 INFO L78 Accepts]: Start accepts. Automaton has 48763 states and 220986 transitions. Word has length 25 [2021-02-19 20:44:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:04,204 INFO L480 AbstractCegarLoop]: Abstraction has 48763 states and 220986 transitions. [2021-02-19 20:44:04,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 48763 states and 220986 transitions. [2021-02-19 20:44:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:04,336 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:04,336 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:44:04,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-02-19 20:44:04,537 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash -98706541, now seen corresponding path program 8 times [2021-02-19 20:44:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:04,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383518940] [2021-02-19 20:44:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:44:04,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383518940] [2021-02-19 20:44:04,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058994298] [2021-02-19 20:44:04,622 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 [2021-02-19 20:44:04,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:44:04,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:44:04,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:44:04,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:04,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:44:04,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925951259] [2021-02-19 20:44:04,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:44:04,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:04,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:44:04,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:44:04,696 INFO L87 Difference]: Start difference. First operand 48763 states and 220986 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:05,747 INFO L93 Difference]: Finished difference Result 49777 states and 225048 transitions. [2021-02-19 20:44:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:44:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:44:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:05,982 INFO L225 Difference]: With dead ends: 49777 [2021-02-19 20:44:05,982 INFO L226 Difference]: Without dead ends: 49701 [2021-02-19 20:44:05,982 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:44:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49701 states. [2021-02-19 20:44:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49701 to 48821. [2021-02-19 20:44:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 4.532548136009832) internal successors, (221279), 48820 states have internal predecessors, (221279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 221279 transitions. [2021-02-19 20:44:07,752 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 221279 transitions. Word has length 25 [2021-02-19 20:44:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:07,752 INFO L480 AbstractCegarLoop]: Abstraction has 48821 states and 221279 transitions. [2021-02-19 20:44:07,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 221279 transitions. [2021-02-19 20:44:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:07,885 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:07,885 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:08,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 20:44:08,086 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 375298267, now seen corresponding path program 9 times [2021-02-19 20:44:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:08,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805476884] [2021-02-19 20:44:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805476884] [2021-02-19 20:44:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122047704] [2021-02-19 20:44:08,163 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 [2021-02-19 20:44:08,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:44:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:08,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:44:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:08,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:08,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-02-19 20:44:08,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051946697] [2021-02-19 20:44:08,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:44:08,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:08,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:44:08,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:44:08,310 INFO L87 Difference]: Start difference. First operand 48821 states and 221279 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:08,911 INFO L93 Difference]: Finished difference Result 61452 states and 276837 transitions. [2021-02-19 20:44:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:44:08,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 25 [2021-02-19 20:44:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:09,160 INFO L225 Difference]: With dead ends: 61452 [2021-02-19 20:44:09,160 INFO L226 Difference]: Without dead ends: 61306 [2021-02-19 20:44:09,161 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:44:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61306 states. [2021-02-19 20:44:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61306 to 49293. [2021-02-19 20:44:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49293 states, 49292 states have (on average 4.534711515053153) internal successors, (223525), 49292 states have internal predecessors, (223525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49293 states to 49293 states and 223525 transitions. [2021-02-19 20:44:11,381 INFO L78 Accepts]: Start accepts. Automaton has 49293 states and 223525 transitions. Word has length 25 [2021-02-19 20:44:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:11,381 INFO L480 AbstractCegarLoop]: Abstraction has 49293 states and 223525 transitions. [2021-02-19 20:44:11,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 49293 states and 223525 transitions. [2021-02-19 20:44:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:11,508 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:11,508 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:11,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 20:44:11,709 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -4856271, now seen corresponding path program 10 times [2021-02-19 20:44:11,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:11,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220796318] [2021-02-19 20:44:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220796318] [2021-02-19 20:44:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440258412] [2021-02-19 20:44:11,762 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) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:11,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:44:11,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:44:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:11,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:11,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-02-19 20:44:11,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131678125] [2021-02-19 20:44:11,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:44:11,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:44:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:44:11,868 INFO L87 Difference]: Start difference. First operand 49293 states and 223525 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:12,334 INFO L93 Difference]: Finished difference Result 50052 states and 226107 transitions. [2021-02-19 20:44:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:44:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:44:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:12,530 INFO L225 Difference]: With dead ends: 50052 [2021-02-19 20:44:12,531 INFO L226 Difference]: Without dead ends: 49806 [2021-02-19 20:44:12,531 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:44:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49806 states. [2021-02-19 20:44:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49806 to 49256. [2021-02-19 20:44:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49256 states, 49255 states have (on average 4.533874733529591) internal successors, (223316), 49255 states have internal predecessors, (223316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49256 states to 49256 states and 223316 transitions. [2021-02-19 20:44:14,303 INFO L78 Accepts]: Start accepts. Automaton has 49256 states and 223316 transitions. Word has length 25 [2021-02-19 20:44:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:14,303 INFO L480 AbstractCegarLoop]: Abstraction has 49256 states and 223316 transitions. [2021-02-19 20:44:14,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49256 states and 223316 transitions. [2021-02-19 20:44:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:14,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:14,432 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:14,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 20:44:14,632 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1732039639, now seen corresponding path program 11 times [2021-02-19 20:44:14,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:14,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48584728] [2021-02-19 20:44:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:14,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48584728] [2021-02-19 20:44:14,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348775293] [2021-02-19 20:44:14,702 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:44:14,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:44:14,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:44:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:14,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:14,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-02-19 20:44:14,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999226350] [2021-02-19 20:44:14,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:44:14,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:14,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:44:14,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:44:14,885 INFO L87 Difference]: Start difference. First operand 49256 states and 223316 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:15,985 INFO L93 Difference]: Finished difference Result 61895 states and 278992 transitions. [2021-02-19 20:44:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:44:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-02-19 20:44:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:16,260 INFO L225 Difference]: With dead ends: 61895 [2021-02-19 20:44:16,261 INFO L226 Difference]: Without dead ends: 61767 [2021-02-19 20:44:16,261 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:44:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61767 states. [2021-02-19 20:44:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61767 to 49426. [2021-02-19 20:44:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49426 states, 49425 states have (on average 4.533414264036419) internal successors, (224064), 49425 states have internal predecessors, (224064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49426 states to 49426 states and 224064 transitions. [2021-02-19 20:44:17,953 INFO L78 Accepts]: Start accepts. Automaton has 49426 states and 224064 transitions. Word has length 25 [2021-02-19 20:44:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:17,953 INFO L480 AbstractCegarLoop]: Abstraction has 49426 states and 224064 transitions. [2021-02-19 20:44:17,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 49426 states and 224064 transitions. [2021-02-19 20:44:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:18,076 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:18,076 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:44:18,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:18,277 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1481636823, now seen corresponding path program 8 times [2021-02-19 20:44:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:18,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142130883] [2021-02-19 20:44:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:18,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142130883] [2021-02-19 20:44:18,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791273499] [2021-02-19 20:44:18,315 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:18,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:44:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:18,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:44:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:18,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:18,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 20:44:18,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399906068] [2021-02-19 20:44:18,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:44:18,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:18,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:44:18,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:44:18,393 INFO L87 Difference]: Start difference. First operand 49426 states and 224064 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:19,304 INFO L93 Difference]: Finished difference Result 55495 states and 248994 transitions. [2021-02-19 20:44:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:44:19,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 25 [2021-02-19 20:44:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:19,608 INFO L225 Difference]: With dead ends: 55495 [2021-02-19 20:44:19,608 INFO L226 Difference]: Without dead ends: 55408 [2021-02-19 20:44:19,608 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:44:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55408 states. [2021-02-19 20:44:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55408 to 51335. [2021-02-19 20:44:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51335 states, 51334 states have (on average 4.539213776444462) internal successors, (233016), 51334 states have internal predecessors, (233016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51335 states to 51335 states and 233016 transitions. [2021-02-19 20:44:21,404 INFO L78 Accepts]: Start accepts. Automaton has 51335 states and 233016 transitions. Word has length 25 [2021-02-19 20:44:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:21,404 INFO L480 AbstractCegarLoop]: Abstraction has 51335 states and 233016 transitions. [2021-02-19 20:44:21,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 51335 states and 233016 transitions. [2021-02-19 20:44:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:21,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:21,522 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:21,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:21,723 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1483047767, now seen corresponding path program 4 times [2021-02-19 20:44:21,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:21,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173821024] [2021-02-19 20:44:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:21,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173821024] [2021-02-19 20:44:21,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791304588] [2021-02-19 20:44:21,756 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 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 [2021-02-19 20:44:21,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:44:21,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:21,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:44:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:21,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:21,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 20:44:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411305089] [2021-02-19 20:44:21,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:44:21,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:21,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:44:21,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:44:21,872 INFO L87 Difference]: Start difference. First operand 51335 states and 233016 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) [2021-02-19 20:44:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:22,367 INFO L93 Difference]: Finished difference Result 56102 states and 251957 transitions. [2021-02-19 20:44:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:44:22,367 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 25 [2021-02-19 20:44:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:22,604 INFO L225 Difference]: With dead ends: 56102 [2021-02-19 20:44:22,604 INFO L226 Difference]: Without dead ends: 56084 [2021-02-19 20:44:22,604 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:44:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56084 states. [2021-02-19 20:44:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56084 to 51549. [2021-02-19 20:44:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51549 states, 51548 states have (on average 4.539322573135718) internal successors, (233993), 51548 states have internal predecessors, (233993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51549 states to 51549 states and 233993 transitions. [2021-02-19 20:44:24,540 INFO L78 Accepts]: Start accepts. Automaton has 51549 states and 233993 transitions. Word has length 25 [2021-02-19 20:44:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:24,541 INFO L480 AbstractCegarLoop]: Abstraction has 51549 states and 233993 transitions. [2021-02-19 20:44:24,541 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) [2021-02-19 20:44:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 51549 states and 233993 transitions. [2021-02-19 20:44:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:25,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:25,109 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:25,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:25,310 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:25,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1933781847, now seen corresponding path program 5 times [2021-02-19 20:44:25,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:25,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432384075] [2021-02-19 20:44:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:25,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432384075] [2021-02-19 20:44:25,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263111226] [2021-02-19 20:44:25,341 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:25,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:44:25,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:25,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:44:25,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:25,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:25,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 20:44:25,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284879307] [2021-02-19 20:44:25,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:44:25,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:44:25,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:44:25,457 INFO L87 Difference]: Start difference. First operand 51549 states and 233993 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:25,955 INFO L93 Difference]: Finished difference Result 59260 states and 264063 transitions. [2021-02-19 20:44:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:44:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:44:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:26,163 INFO L225 Difference]: With dead ends: 59260 [2021-02-19 20:44:26,163 INFO L226 Difference]: Without dead ends: 59260 [2021-02-19 20:44:26,163 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:44:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59260 states. [2021-02-19 20:44:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59260 to 51339. [2021-02-19 20:44:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51339 states, 51338 states have (on average 4.534866960146481) internal successors, (232811), 51338 states have internal predecessors, (232811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51339 states to 51339 states and 232811 transitions. [2021-02-19 20:44:27,884 INFO L78 Accepts]: Start accepts. Automaton has 51339 states and 232811 transitions. Word has length 25 [2021-02-19 20:44:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:27,884 INFO L480 AbstractCegarLoop]: Abstraction has 51339 states and 232811 transitions. [2021-02-19 20:44:27,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 51339 states and 232811 transitions. [2021-02-19 20:44:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:28,010 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:28,010 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:28,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:28,210 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1266510983, now seen corresponding path program 6 times [2021-02-19 20:44:28,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:28,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396541160] [2021-02-19 20:44:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:28,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396541160] [2021-02-19 20:44:28,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202751654] [2021-02-19 20:44:28,244 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:28,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 20:44:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:44:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:28,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:28,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 20:44:28,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936055248] [2021-02-19 20:44:28,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:44:28,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:28,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:44:28,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:44:28,344 INFO L87 Difference]: Start difference. First operand 51339 states and 232811 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:29,365 INFO L93 Difference]: Finished difference Result 55814 states and 250510 transitions. [2021-02-19 20:44:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:44:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-02-19 20:44:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:29,601 INFO L225 Difference]: With dead ends: 55814 [2021-02-19 20:44:29,602 INFO L226 Difference]: Without dead ends: 55796 [2021-02-19 20:44:29,602 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:44:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55796 states. [2021-02-19 20:44:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55796 to 51353. [2021-02-19 20:44:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51353 states, 51352 states have (on average 4.534234304408787) internal successors, (232842), 51352 states have internal predecessors, (232842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51353 states to 51353 states and 232842 transitions. [2021-02-19 20:44:31,280 INFO L78 Accepts]: Start accepts. Automaton has 51353 states and 232842 transitions. Word has length 25 [2021-02-19 20:44:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:31,280 INFO L480 AbstractCegarLoop]: Abstraction has 51353 states and 232842 transitions. [2021-02-19 20:44:31,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 51353 states and 232842 transitions. [2021-02-19 20:44:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:31,388 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:31,388 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:31,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 20:44:31,588 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash -727892725, now seen corresponding path program 7 times [2021-02-19 20:44:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:31,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305494044] [2021-02-19 20:44:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:31,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305494044] [2021-02-19 20:44:31,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445504083] [2021-02-19 20:44:31,630 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:44:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:31,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:31,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 20:44:31,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677686618] [2021-02-19 20:44:31,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:44:31,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:31,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:44:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:44:31,731 INFO L87 Difference]: Start difference. First operand 51353 states and 232842 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:32,277 INFO L93 Difference]: Finished difference Result 63920 states and 283289 transitions. [2021-02-19 20:44:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:44:32,277 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-02-19 20:44:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:33,038 INFO L225 Difference]: With dead ends: 63920 [2021-02-19 20:44:33,039 INFO L226 Difference]: Without dead ends: 63920 [2021-02-19 20:44:33,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:44:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63920 states. [2021-02-19 20:44:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63920 to 51527. [2021-02-19 20:44:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51527 states, 51526 states have (on average 4.532177929588945) internal successors, (233525), 51526 states have internal predecessors, (233525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51527 states to 51527 states and 233525 transitions. [2021-02-19 20:44:34,699 INFO L78 Accepts]: Start accepts. Automaton has 51527 states and 233525 transitions. Word has length 25 [2021-02-19 20:44:34,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:34,700 INFO L480 AbstractCegarLoop]: Abstraction has 51527 states and 233525 transitions. [2021-02-19 20:44:34,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51527 states and 233525 transitions. [2021-02-19 20:44:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:34,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:34,812 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:35,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 20:44:35,012 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1613691005, now seen corresponding path program 8 times [2021-02-19 20:44:35,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:35,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871849694] [2021-02-19 20:44:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:35,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871849694] [2021-02-19 20:44:35,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381982707] [2021-02-19 20:44:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:35,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:44:35,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:35,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:44:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:35,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:35,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 20:44:35,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54918160] [2021-02-19 20:44:35,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:44:35,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:35,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:44:35,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:44:35,160 INFO L87 Difference]: Start difference. First operand 51527 states and 233525 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:35,621 INFO L93 Difference]: Finished difference Result 52042 states and 235434 transitions. [2021-02-19 20:44:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:44:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-02-19 20:44:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:35,804 INFO L225 Difference]: With dead ends: 52042 [2021-02-19 20:44:35,805 INFO L226 Difference]: Without dead ends: 51942 [2021-02-19 20:44:35,805 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:44:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51942 states. [2021-02-19 20:44:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51942 to 51583. [2021-02-19 20:44:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51583 states, 51582 states have (on average 4.531328758093909) internal successors, (233735), 51582 states have internal predecessors, (233735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51583 states to 51583 states and 233735 transitions. [2021-02-19 20:44:37,550 INFO L78 Accepts]: Start accepts. Automaton has 51583 states and 233735 transitions. Word has length 25 [2021-02-19 20:44:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:37,550 INFO L480 AbstractCegarLoop]: Abstraction has 51583 states and 233735 transitions. [2021-02-19 20:44:37,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 51583 states and 233735 transitions. [2021-02-19 20:44:37,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:37,676 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:37,676 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:37,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-02-19 20:44:37,876 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash -93858673, now seen corresponding path program 9 times [2021-02-19 20:44:37,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:37,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891867001] [2021-02-19 20:44:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:37,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891867001] [2021-02-19 20:44:37,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983226675] [2021-02-19 20:44:37,924 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 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 [2021-02-19 20:44:38,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:44:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:44:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:38,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:38,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 20:44:38,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498303879] [2021-02-19 20:44:38,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:44:38,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:38,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:44:38,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:44:38,421 INFO L87 Difference]: Start difference. First operand 51583 states and 233735 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) [2021-02-19 20:44:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:39,500 INFO L93 Difference]: Finished difference Result 100124 states and 444313 transitions. [2021-02-19 20:44:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 20:44:39,500 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 25 [2021-02-19 20:44:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:39,943 INFO L225 Difference]: With dead ends: 100124 [2021-02-19 20:44:39,944 INFO L226 Difference]: Without dead ends: 100124 [2021-02-19 20:44:39,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:44:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100124 states. [2021-02-19 20:44:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100124 to 64172. [2021-02-19 20:44:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64172 states, 64171 states have (on average 4.570725093889763) internal successors, (293308), 64171 states have internal predecessors, (293308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64172 states to 64172 states and 293308 transitions. [2021-02-19 20:44:42,986 INFO L78 Accepts]: Start accepts. Automaton has 64172 states and 293308 transitions. Word has length 25 [2021-02-19 20:44:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:42,987 INFO L480 AbstractCegarLoop]: Abstraction has 64172 states and 293308 transitions. [2021-02-19 20:44:42,987 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) [2021-02-19 20:44:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 64172 states and 293308 transitions. [2021-02-19 20:44:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:43,157 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:43,157 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:43,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:43,357 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:43,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1153022543, now seen corresponding path program 10 times [2021-02-19 20:44:43,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:43,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137716557] [2021-02-19 20:44:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:43,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137716557] [2021-02-19 20:44:43,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963305211] [2021-02-19 20:44:43,411 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:43,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:44:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:43,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:44:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 20:44:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384854259] [2021-02-19 20:44:43,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:44:43,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:43,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:44:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:44:43,500 INFO L87 Difference]: Start difference. First operand 64172 states and 293308 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:44,682 INFO L93 Difference]: Finished difference Result 81001 states and 360084 transitions. [2021-02-19 20:44:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 20:44:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-02-19 20:44:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:45,020 INFO L225 Difference]: With dead ends: 81001 [2021-02-19 20:44:45,020 INFO L226 Difference]: Without dead ends: 81001 [2021-02-19 20:44:45,020 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:44:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81001 states. [2021-02-19 20:44:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81001 to 65038. [2021-02-19 20:44:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65038 states, 65037 states have (on average 4.565139843473715) internal successors, (296903), 65037 states have internal predecessors, (296903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65038 states to 65038 states and 296903 transitions. [2021-02-19 20:44:47,174 INFO L78 Accepts]: Start accepts. Automaton has 65038 states and 296903 transitions. Word has length 25 [2021-02-19 20:44:47,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:47,174 INFO L480 AbstractCegarLoop]: Abstraction has 65038 states and 296903 transitions. [2021-02-19 20:44:47,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 65038 states and 296903 transitions. [2021-02-19 20:44:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:47,333 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:47,333 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:47,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 20:44:47,534 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -942481145, now seen corresponding path program 11 times [2021-02-19 20:44:47,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:47,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080539984] [2021-02-19 20:44:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:47,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080539984] [2021-02-19 20:44:47,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613435227] [2021-02-19 20:44:47,604 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:44:47,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:44:47,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:44:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:47,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:47,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 20:44:47,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187682983] [2021-02-19 20:44:47,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:44:47,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:47,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:44:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:44:47,749 INFO L87 Difference]: Start difference. First operand 65038 states and 296903 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 20:44:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:49,195 INFO L93 Difference]: Finished difference Result 78078 states and 353134 transitions. [2021-02-19 20:44:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:44:49,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 [2021-02-19 20:44:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:49,528 INFO L225 Difference]: With dead ends: 78078 [2021-02-19 20:44:49,528 INFO L226 Difference]: Without dead ends: 77932 [2021-02-19 20:44:49,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:44:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77932 states. [2021-02-19 20:44:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77932 to 65006. [2021-02-19 20:44:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65006 states, 65005 states have (on average 4.565633412814399) internal successors, (296789), 65005 states have internal predecessors, (296789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65006 states to 65006 states and 296789 transitions. [2021-02-19 20:44:52,031 INFO L78 Accepts]: Start accepts. Automaton has 65006 states and 296789 transitions. Word has length 25 [2021-02-19 20:44:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:52,031 INFO L480 AbstractCegarLoop]: Abstraction has 65006 states and 296789 transitions. [2021-02-19 20:44:52,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 20:44:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 65006 states and 296789 transitions. [2021-02-19 20:44:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:52,745 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:52,745 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:52,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 20:44:52,946 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:52,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:52,946 INFO L82 PathProgramCache]: Analyzing trace with hash 138885219, now seen corresponding path program 12 times [2021-02-19 20:44:52,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:52,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860899942] [2021-02-19 20:44:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:52,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860899942] [2021-02-19 20:44:52,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110349771] [2021-02-19 20:44:52,985 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:53,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 20:44:53,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:44:53,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:44:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:44:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:53,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:53,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 20:44:53,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924363219] [2021-02-19 20:44:53,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:44:53,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:44:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:44:53,103 INFO L87 Difference]: Start difference. First operand 65006 states and 296789 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:54,056 INFO L93 Difference]: Finished difference Result 104033 states and 462840 transitions. [2021-02-19 20:44:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:44:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:44:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:44:54,525 INFO L225 Difference]: With dead ends: 104033 [2021-02-19 20:44:54,525 INFO L226 Difference]: Without dead ends: 104015 [2021-02-19 20:44:54,526 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:44:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104015 states. [2021-02-19 20:44:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104015 to 67550. [2021-02-19 20:44:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67550 states, 67549 states have (on average 4.567380716220818) internal successors, (308522), 67549 states have internal predecessors, (308522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67550 states to 67550 states and 308522 transitions. [2021-02-19 20:44:57,855 INFO L78 Accepts]: Start accepts. Automaton has 67550 states and 308522 transitions. Word has length 25 [2021-02-19 20:44:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:44:57,855 INFO L480 AbstractCegarLoop]: Abstraction has 67550 states and 308522 transitions. [2021-02-19 20:44:57,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:44:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 67550 states and 308522 transitions. [2021-02-19 20:44:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:44:58,060 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:44:58,060 INFO L506 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, 1, 1, 1] [2021-02-19 20:44:58,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:58,283 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:44:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:44:58,284 INFO L82 PathProgramCache]: Analyzing trace with hash 355913209, now seen corresponding path program 13 times [2021-02-19 20:44:58,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:44:58,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704077985] [2021-02-19 20:44:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:44:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:58,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704077985] [2021-02-19 20:44:58,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816950958] [2021-02-19 20:44:58,346 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:44:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:44:58,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:44:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:44:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:44:58,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:44:58,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 20:44:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418920026] [2021-02-19 20:44:58,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:44:58,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:44:58,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:44:58,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:44:58,471 INFO L87 Difference]: Start difference. First operand 67550 states and 308522 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 20:44:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:44:59,828 INFO L93 Difference]: Finished difference Result 90057 states and 403719 transitions. [2021-02-19 20:44:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:44:59,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 [2021-02-19 20:44:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:00,272 INFO L225 Difference]: With dead ends: 90057 [2021-02-19 20:45:00,272 INFO L226 Difference]: Without dead ends: 90057 [2021-02-19 20:45:00,272 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:45:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90057 states. [2021-02-19 20:45:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90057 to 67733. [2021-02-19 20:45:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67733 states, 67732 states have (on average 4.566940294100277) internal successors, (309328), 67732 states have internal predecessors, (309328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67733 states to 67733 states and 309328 transitions. [2021-02-19 20:45:03,001 INFO L78 Accepts]: Start accepts. Automaton has 67733 states and 309328 transitions. Word has length 25 [2021-02-19 20:45:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:03,001 INFO L480 AbstractCegarLoop]: Abstraction has 67733 states and 309328 transitions. [2021-02-19 20:45:03,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 20:45:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 67733 states and 309328 transitions. [2021-02-19 20:45:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:03,671 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:03,671 INFO L506 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, 1, 1, 1] [2021-02-19 20:45:03,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-02-19 20:45:03,882 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 627101911, now seen corresponding path program 14 times [2021-02-19 20:45:03,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:03,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440993421] [2021-02-19 20:45:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:03,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440993421] [2021-02-19 20:45:03,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161661207] [2021-02-19 20:45:03,930 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:03,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:45:03,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:45:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:04,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:04,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 20:45:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892624903] [2021-02-19 20:45:04,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:45:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:45:04,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:45:04,054 INFO L87 Difference]: Start difference. First operand 67733 states and 309328 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 20:45:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:05,128 INFO L93 Difference]: Finished difference Result 122610 states and 547864 transitions. [2021-02-19 20:45:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 20:45:05,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 [2021-02-19 20:45:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:05,685 INFO L225 Difference]: With dead ends: 122610 [2021-02-19 20:45:05,685 INFO L226 Difference]: Without dead ends: 122610 [2021-02-19 20:45:05,685 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:45:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122610 states. [2021-02-19 20:45:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122610 to 79246. [2021-02-19 20:45:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79246 states, 79245 states have (on average 4.562836772036091) internal successors, (361582), 79245 states have internal predecessors, (361582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79246 states to 79246 states and 361582 transitions. [2021-02-19 20:45:09,523 INFO L78 Accepts]: Start accepts. Automaton has 79246 states and 361582 transitions. Word has length 25 [2021-02-19 20:45:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:09,523 INFO L480 AbstractCegarLoop]: Abstraction has 79246 states and 361582 transitions. [2021-02-19 20:45:09,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 20:45:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 79246 states and 361582 transitions. [2021-02-19 20:45:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:10,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:10,295 INFO L506 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, 1, 1, 1] [2021-02-19 20:45:10,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:10,496 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:10,496 INFO L82 PathProgramCache]: Analyzing trace with hash 677871993, now seen corresponding path program 15 times [2021-02-19 20:45:10,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:10,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397675257] [2021-02-19 20:45:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:10,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397675257] [2021-02-19 20:45:10,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737650277] [2021-02-19 20:45:10,540 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:10,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:45:10,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:45:10,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:10,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:10,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 20:45:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661862004] [2021-02-19 20:45:10,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:45:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:10,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:45:10,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:45:10,637 INFO L87 Difference]: Start difference. First operand 79246 states and 361582 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:11,462 INFO L93 Difference]: Finished difference Result 96142 states and 428332 transitions. [2021-02-19 20:45:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 20:45:11,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:11,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:11,837 INFO L225 Difference]: With dead ends: 96142 [2021-02-19 20:45:11,838 INFO L226 Difference]: Without dead ends: 96142 [2021-02-19 20:45:11,838 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:45:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96142 states. [2021-02-19 20:45:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96142 to 79972. [2021-02-19 20:45:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79972 states, 79971 states have (on average 4.557339535581648) internal successors, (364455), 79971 states have internal predecessors, (364455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79972 states to 79972 states and 364455 transitions. [2021-02-19 20:45:15,178 INFO L78 Accepts]: Start accepts. Automaton has 79972 states and 364455 transitions. Word has length 25 [2021-02-19 20:45:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:15,178 INFO L480 AbstractCegarLoop]: Abstraction has 79972 states and 364455 transitions. [2021-02-19 20:45:15,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 79972 states and 364455 transitions. [2021-02-19 20:45:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:15,401 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:15,401 INFO L506 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, 1, 1, 1] [2021-02-19 20:45:15,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 20:45:15,603 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -995673877, now seen corresponding path program 16 times [2021-02-19 20:45:15,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:15,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752568852] [2021-02-19 20:45:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752568852] [2021-02-19 20:45:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060553745] [2021-02-19 20:45:15,671 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:15,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:45:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:15,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:45:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:15,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:15,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 20:45:15,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480927851] [2021-02-19 20:45:15,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:45:15,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:15,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:45:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:45:15,794 INFO L87 Difference]: Start difference. First operand 79972 states and 364455 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:17,191 INFO L93 Difference]: Finished difference Result 99261 states and 447791 transitions. [2021-02-19 20:45:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:45:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:17,701 INFO L225 Difference]: With dead ends: 99261 [2021-02-19 20:45:17,702 INFO L226 Difference]: Without dead ends: 99097 [2021-02-19 20:45:17,702 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:45:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99097 states. [2021-02-19 20:45:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99097 to 79999. [2021-02-19 20:45:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79999 states, 79998 states have (on average 4.557163929098228) internal successors, (364564), 79998 states have internal predecessors, (364564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79999 states to 79999 states and 364564 transitions. [2021-02-19 20:45:20,976 INFO L78 Accepts]: Start accepts. Automaton has 79999 states and 364564 transitions. Word has length 25 [2021-02-19 20:45:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:20,976 INFO L480 AbstractCegarLoop]: Abstraction has 79999 states and 364564 transitions. [2021-02-19 20:45:20,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 79999 states and 364564 transitions. [2021-02-19 20:45:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:21,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:21,199 INFO L506 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, 1, 1, 1] [2021-02-19 20:45:21,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:21,400 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1807320133, now seen corresponding path program 17 times [2021-02-19 20:45:21,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:21,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820802593] [2021-02-19 20:45:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:21,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820802593] [2021-02-19 20:45:21,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002149815] [2021-02-19 20:45:21,461 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:21,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:45:21,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:45:21,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:21,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:21,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 20:45:21,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777909707] [2021-02-19 20:45:21,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:45:21,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:45:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:45:21,554 INFO L87 Difference]: Start difference. First operand 79999 states and 364564 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:22,221 INFO L93 Difference]: Finished difference Result 80665 states and 366852 transitions. [2021-02-19 20:45:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:45:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:23,269 INFO L225 Difference]: With dead ends: 80665 [2021-02-19 20:45:23,269 INFO L226 Difference]: Without dead ends: 80565 [2021-02-19 20:45:23,269 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:45:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80565 states. [2021-02-19 20:45:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80565 to 79999. [2021-02-19 20:45:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79999 states, 79998 states have (on average 4.556826420660516) internal successors, (364537), 79998 states have internal predecessors, (364537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79999 states to 79999 states and 364537 transitions. [2021-02-19 20:45:25,706 INFO L78 Accepts]: Start accepts. Automaton has 79999 states and 364537 transitions. Word has length 25 [2021-02-19 20:45:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:25,706 INFO L480 AbstractCegarLoop]: Abstraction has 79999 states and 364537 transitions. [2021-02-19 20:45:25,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 79999 states and 364537 transitions. [2021-02-19 20:45:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:25,930 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:25,930 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:26,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:26,131 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash 863002843, now seen corresponding path program 7 times [2021-02-19 20:45:26,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:26,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130278312] [2021-02-19 20:45:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:26,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130278312] [2021-02-19 20:45:26,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384321409] [2021-02-19 20:45:26,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:45:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:26,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:45:26,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-02-19 20:45:26,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246922812] [2021-02-19 20:45:26,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:45:26,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:26,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:45:26,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:45:26,256 INFO L87 Difference]: Start difference. First operand 79999 states and 364537 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:27,656 INFO L93 Difference]: Finished difference Result 85218 states and 382848 transitions. [2021-02-19 20:45:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:45:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:27,918 INFO L225 Difference]: With dead ends: 85218 [2021-02-19 20:45:27,919 INFO L226 Difference]: Without dead ends: 83175 [2021-02-19 20:45:27,919 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:45:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83175 states. [2021-02-19 20:45:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83175 to 70167. [2021-02-19 20:45:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70167 states, 70166 states have (on average 4.57720263375424) internal successors, (321164), 70166 states have internal predecessors, (321164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70167 states to 70167 states and 321164 transitions. [2021-02-19 20:45:29,879 INFO L78 Accepts]: Start accepts. Automaton has 70167 states and 321164 transitions. Word has length 25 [2021-02-19 20:45:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:29,879 INFO L480 AbstractCegarLoop]: Abstraction has 70167 states and 321164 transitions. [2021-02-19 20:45:29,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 70167 states and 321164 transitions. [2021-02-19 20:45:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:30,492 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:30,492 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:30,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:30,693 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1128370213, now seen corresponding path program 8 times [2021-02-19 20:45:30,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:30,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678503130] [2021-02-19 20:45:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:30,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678503130] [2021-02-19 20:45:30,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:45:30,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 20:45:30,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101990211] [2021-02-19 20:45:30,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:45:30,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:45:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:45:30,711 INFO L87 Difference]: Start difference. First operand 70167 states and 321164 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:31,130 INFO L93 Difference]: Finished difference Result 75085 states and 336999 transitions. [2021-02-19 20:45:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:45:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:31,349 INFO L225 Difference]: With dead ends: 75085 [2021-02-19 20:45:31,349 INFO L226 Difference]: Without dead ends: 70761 [2021-02-19 20:45:31,350 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:45:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70761 states. [2021-02-19 20:45:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70761 to 53062. [2021-02-19 20:45:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53062 states, 53061 states have (on average 4.569005484253972) internal successors, (242436), 53061 states have internal predecessors, (242436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53062 states to 53062 states and 242436 transitions. [2021-02-19 20:45:32,889 INFO L78 Accepts]: Start accepts. Automaton has 53062 states and 242436 transitions. Word has length 25 [2021-02-19 20:45:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:32,889 INFO L480 AbstractCegarLoop]: Abstraction has 53062 states and 242436 transitions. [2021-02-19 20:45:32,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 53062 states and 242436 transitions. [2021-02-19 20:45:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:32,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:32,991 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:32,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-02-19 20:45:32,991 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1755410903, now seen corresponding path program 9 times [2021-02-19 20:45:32,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:32,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586583545] [2021-02-19 20:45:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:33,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586583545] [2021-02-19 20:45:33,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811946130] [2021-02-19 20:45:33,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:33,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:45:33,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:45:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:33,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:33,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:45:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172697135] [2021-02-19 20:45:33,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:45:33,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:45:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:33,118 INFO L87 Difference]: Start difference. First operand 53062 states and 242436 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:33,877 INFO L93 Difference]: Finished difference Result 54996 states and 249906 transitions. [2021-02-19 20:45:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:45:33,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:34,038 INFO L225 Difference]: With dead ends: 54996 [2021-02-19 20:45:34,038 INFO L226 Difference]: Without dead ends: 54860 [2021-02-19 20:45:34,038 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54860 states. [2021-02-19 20:45:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54860 to 53065. [2021-02-19 20:45:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53065 states, 53064 states have (on average 4.570349012513192) internal successors, (242521), 53064 states have internal predecessors, (242521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53065 states to 53065 states and 242521 transitions. [2021-02-19 20:45:35,446 INFO L78 Accepts]: Start accepts. Automaton has 53065 states and 242521 transitions. Word has length 25 [2021-02-19 20:45:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:35,447 INFO L480 AbstractCegarLoop]: Abstraction has 53065 states and 242521 transitions. [2021-02-19 20:45:35,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 53065 states and 242521 transitions. [2021-02-19 20:45:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:35,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:35,547 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:35,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:35,747 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:35,748 INFO L82 PathProgramCache]: Analyzing trace with hash -86188589, now seen corresponding path program 10 times [2021-02-19 20:45:35,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:35,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207631015] [2021-02-19 20:45:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:35,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207631015] [2021-02-19 20:45:35,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695893786] [2021-02-19 20:45:35,802 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) [2021-02-19 20:45:35,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:45:35,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:45:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:35,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:35,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:45:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555792334] [2021-02-19 20:45:35,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:45:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:45:35,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:35,889 INFO L87 Difference]: Start difference. First operand 53065 states and 242521 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:36,318 INFO L93 Difference]: Finished difference Result 55438 states and 251857 transitions. [2021-02-19 20:45:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:45:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:36,483 INFO L225 Difference]: With dead ends: 55438 [2021-02-19 20:45:36,483 INFO L226 Difference]: Without dead ends: 55302 [2021-02-19 20:45:36,483 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-02-19 20:45:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 53099. [2021-02-19 20:45:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53099 states, 53098 states have (on average 4.5712832875061205) internal successors, (242726), 53098 states have internal predecessors, (242726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53099 states to 53099 states and 242726 transitions. [2021-02-19 20:45:37,970 INFO L78 Accepts]: Start accepts. Automaton has 53099 states and 242726 transitions. Word has length 25 [2021-02-19 20:45:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:37,970 INFO L480 AbstractCegarLoop]: Abstraction has 53099 states and 242726 transitions. [2021-02-19 20:45:37,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 53099 states and 242726 transitions. [2021-02-19 20:45:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:38,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:38,479 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:38,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 20:45:38,679 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:38,679 INFO L82 PathProgramCache]: Analyzing trace with hash -399648365, now seen corresponding path program 11 times [2021-02-19 20:45:38,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:38,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010436133] [2021-02-19 20:45:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:38,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010436133] [2021-02-19 20:45:38,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856702087] [2021-02-19 20:45:38,762 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 [2021-02-19 20:45:38,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:45:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:45:38,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:38,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:38,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:45:38,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317918089] [2021-02-19 20:45:38,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:45:38,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:45:38,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:38,846 INFO L87 Difference]: Start difference. First operand 53099 states and 242726 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:39,370 INFO L93 Difference]: Finished difference Result 54722 states and 249164 transitions. [2021-02-19 20:45:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:45:39,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:39,531 INFO L225 Difference]: With dead ends: 54722 [2021-02-19 20:45:39,531 INFO L226 Difference]: Without dead ends: 54606 [2021-02-19 20:45:39,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54606 states. [2021-02-19 20:45:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54606 to 53135. [2021-02-19 20:45:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53135 states, 53134 states have (on average 4.571987804419016) internal successors, (242928), 53134 states have internal predecessors, (242928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53135 states to 53135 states and 242928 transitions. [2021-02-19 20:45:40,876 INFO L78 Accepts]: Start accepts. Automaton has 53135 states and 242928 transitions. Word has length 25 [2021-02-19 20:45:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:40,876 INFO L480 AbstractCegarLoop]: Abstraction has 53135 states and 242928 transitions. [2021-02-19 20:45:40,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 53135 states and 242928 transitions. [2021-02-19 20:45:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:40,979 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:40,979 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:41,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:41,180 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash 957093007, now seen corresponding path program 12 times [2021-02-19 20:45:41,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:41,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060622847] [2021-02-19 20:45:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:41,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060622847] [2021-02-19 20:45:41,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567515608] [2021-02-19 20:45:41,256 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) [2021-02-19 20:45:41,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:45:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:45:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:41,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:41,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:45:41,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831066357] [2021-02-19 20:45:41,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:45:41,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:45:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:41,343 INFO L87 Difference]: Start difference. First operand 53135 states and 242928 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:42,135 INFO L93 Difference]: Finished difference Result 54295 states and 247458 transitions. [2021-02-19 20:45:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:45:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:42,316 INFO L225 Difference]: With dead ends: 54295 [2021-02-19 20:45:42,316 INFO L226 Difference]: Without dead ends: 54199 [2021-02-19 20:45:42,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54199 states. [2021-02-19 20:45:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54199 to 53157. [2021-02-19 20:45:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53157 states, 53156 states have (on average 4.572484761833095) internal successors, (243055), 53156 states have internal predecessors, (243055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53157 states to 53157 states and 243055 transitions. [2021-02-19 20:45:43,836 INFO L78 Accepts]: Start accepts. Automaton has 53157 states and 243055 transitions. Word has length 25 [2021-02-19 20:45:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:43,836 INFO L480 AbstractCegarLoop]: Abstraction has 53157 states and 243055 transitions. [2021-02-19 20:45:43,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 53157 states and 243055 transitions. [2021-02-19 20:45:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:43,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:43,942 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:44,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:44,143 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash 829414303, now seen corresponding path program 13 times [2021-02-19 20:45:44,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:44,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328523226] [2021-02-19 20:45:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328523226] [2021-02-19 20:45:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527694841] [2021-02-19 20:45:44,204 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:45:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:44,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:44,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:45:44,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624055330] [2021-02-19 20:45:44,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:45:44,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:44,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:45:44,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:44,277 INFO L87 Difference]: Start difference. First operand 53157 states and 243055 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:44,649 INFO L93 Difference]: Finished difference Result 55817 states and 253349 transitions. [2021-02-19 20:45:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:45:44,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:44,812 INFO L225 Difference]: With dead ends: 55817 [2021-02-19 20:45:44,812 INFO L226 Difference]: Without dead ends: 55681 [2021-02-19 20:45:44,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55681 states. [2021-02-19 20:45:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55681 to 53198. [2021-02-19 20:45:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53198 states, 53197 states have (on average 4.573472188281294) internal successors, (243295), 53197 states have internal predecessors, (243295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53198 states to 53198 states and 243295 transitions. [2021-02-19 20:45:46,288 INFO L78 Accepts]: Start accepts. Automaton has 53198 states and 243295 transitions. Word has length 25 [2021-02-19 20:45:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:46,288 INFO L480 AbstractCegarLoop]: Abstraction has 53198 states and 243295 transitions. [2021-02-19 20:45:46,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 53198 states and 243295 transitions. [2021-02-19 20:45:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:46,400 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:46,400 INFO L506 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, 1, 1, 1] [2021-02-19 20:45:46,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:46,601 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1928535071, now seen corresponding path program 12 times [2021-02-19 20:45:46,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:46,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208276862] [2021-02-19 20:45:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:46,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208276862] [2021-02-19 20:45:46,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962502380] [2021-02-19 20:45:46,626 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:45:46,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:45:46,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:46,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:45:46,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:46,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:46,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 20:45:46,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808166634] [2021-02-19 20:45:46,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:45:46,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:45:46,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:45:46,737 INFO L87 Difference]: Start difference. First operand 53198 states and 243295 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:47,692 INFO L93 Difference]: Finished difference Result 80850 states and 364886 transitions. [2021-02-19 20:45:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:45:47,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-02-19 20:45:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:47,938 INFO L225 Difference]: With dead ends: 80850 [2021-02-19 20:45:47,938 INFO L226 Difference]: Without dead ends: 80449 [2021-02-19 20:45:47,938 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:45:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80449 states. [2021-02-19 20:45:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80449 to 69299. [2021-02-19 20:45:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69299 states, 69298 states have (on average 4.598184651793702) internal successors, (318645), 69298 states have internal predecessors, (318645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69299 states to 69299 states and 318645 transitions. [2021-02-19 20:45:50,250 INFO L78 Accepts]: Start accepts. Automaton has 69299 states and 318645 transitions. Word has length 25 [2021-02-19 20:45:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:50,250 INFO L480 AbstractCegarLoop]: Abstraction has 69299 states and 318645 transitions. [2021-02-19 20:45:50,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 69299 states and 318645 transitions. [2021-02-19 20:45:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:50,409 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:50,409 INFO L506 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, 1, 1, 1] [2021-02-19 20:45:50,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:50,610 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1998428635, now seen corresponding path program 13 times [2021-02-19 20:45:50,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:50,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813043065] [2021-02-19 20:45:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:50,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813043065] [2021-02-19 20:45:50,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581115161] [2021-02-19 20:45:50,635 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:45:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:50,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:45:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:45:50,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:50,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 20:45:50,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690486122] [2021-02-19 20:45:50,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:45:50,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:50,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:45:50,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:45:50,746 INFO L87 Difference]: Start difference. First operand 69299 states and 318645 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:51,528 INFO L93 Difference]: Finished difference Result 88384 states and 401832 transitions. [2021-02-19 20:45:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:45:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-02-19 20:45:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:51,802 INFO L225 Difference]: With dead ends: 88384 [2021-02-19 20:45:51,802 INFO L226 Difference]: Without dead ends: 88241 [2021-02-19 20:45:51,802 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:45:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88241 states. [2021-02-19 20:45:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88241 to 80105. [2021-02-19 20:45:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80105 states, 80104 states have (on average 4.628757615100369) internal successors, (370782), 80104 states have internal predecessors, (370782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80105 states to 80105 states and 370782 transitions. [2021-02-19 20:45:54,306 INFO L78 Accepts]: Start accepts. Automaton has 80105 states and 370782 transitions. Word has length 25 [2021-02-19 20:45:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:54,306 INFO L480 AbstractCegarLoop]: Abstraction has 80105 states and 370782 transitions. [2021-02-19 20:45:54,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 80105 states and 370782 transitions. [2021-02-19 20:45:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:54,468 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:54,468 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:54,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:54,668 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash 515954527, now seen corresponding path program 14 times [2021-02-19 20:45:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:54,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034206948] [2021-02-19 20:45:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:54,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034206948] [2021-02-19 20:45:54,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297070426] [2021-02-19 20:45:54,755 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:54,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:45:54,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:45:54,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:54,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:54,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:45:54,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413108811] [2021-02-19 20:45:54,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:45:54,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:45:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:54,822 INFO L87 Difference]: Start difference. First operand 80105 states and 370782 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:55,935 INFO L93 Difference]: Finished difference Result 81917 states and 377729 transitions. [2021-02-19 20:45:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:45:55,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:45:56,191 INFO L225 Difference]: With dead ends: 81917 [2021-02-19 20:45:56,191 INFO L226 Difference]: Without dead ends: 81801 [2021-02-19 20:45:56,191 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81801 states. [2021-02-19 20:45:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81801 to 80135. [2021-02-19 20:45:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80135 states, 80134 states have (on average 4.629158659245763) internal successors, (370953), 80134 states have internal predecessors, (370953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80135 states to 80135 states and 370953 transitions. [2021-02-19 20:45:58,228 INFO L78 Accepts]: Start accepts. Automaton has 80135 states and 370953 transitions. Word has length 25 [2021-02-19 20:45:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:45:58,228 INFO L480 AbstractCegarLoop]: Abstraction has 80135 states and 370953 transitions. [2021-02-19 20:45:58,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 80135 states and 370953 transitions. [2021-02-19 20:45:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:45:58,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:45:58,969 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:45:59,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:45:59,174 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:45:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:45:59,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1872695899, now seen corresponding path program 15 times [2021-02-19 20:45:59,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:45:59,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065949764] [2021-02-19 20:45:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:45:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:45:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:59,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065949764] [2021-02-19 20:45:59,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35046543] [2021-02-19 20:45:59,251 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 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 [2021-02-19 20:45:59,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:45:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:45:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:45:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:45:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:45:59,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:45:59,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:45:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603001140] [2021-02-19 20:45:59,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:45:59,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:45:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:45:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:45:59,318 INFO L87 Difference]: Start difference. First operand 80135 states and 370953 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:45:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:45:59,843 INFO L93 Difference]: Finished difference Result 82478 states and 380208 transitions. [2021-02-19 20:45:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:45:59,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:45:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:00,103 INFO L225 Difference]: With dead ends: 82478 [2021-02-19 20:46:00,103 INFO L226 Difference]: Without dead ends: 82382 [2021-02-19 20:46:00,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82382 states. [2021-02-19 20:46:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82382 to 80167. [2021-02-19 20:46:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80167 states, 80166 states have (on average 4.629655963874959) internal successors, (371141), 80166 states have internal predecessors, (371141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80167 states to 80167 states and 371141 transitions. [2021-02-19 20:46:02,652 INFO L78 Accepts]: Start accepts. Automaton has 80167 states and 371141 transitions. Word has length 25 [2021-02-19 20:46:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:02,652 INFO L480 AbstractCegarLoop]: Abstraction has 80167 states and 371141 transitions. [2021-02-19 20:46:02,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 80167 states and 371141 transitions. [2021-02-19 20:46:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:02,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:02,811 INFO L506 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, 1, 1, 1] [2021-02-19 20:46:03,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-02-19 20:46:03,012 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash 460613991, now seen corresponding path program 14 times [2021-02-19 20:46:03,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:03,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062103004] [2021-02-19 20:46:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:03,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062103004] [2021-02-19 20:46:03,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036827246] [2021-02-19 20:46:03,042 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:46:03,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:46:03,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:03,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:46:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:03,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:03,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 20:46:03,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196269663] [2021-02-19 20:46:03,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:46:03,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:03,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:46:03,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:46:03,145 INFO L87 Difference]: Start difference. First operand 80167 states and 371141 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:04,486 INFO L93 Difference]: Finished difference Result 97014 states and 446446 transitions. [2021-02-19 20:46:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:46:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:46:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:05,141 INFO L225 Difference]: With dead ends: 97014 [2021-02-19 20:46:05,141 INFO L226 Difference]: Without dead ends: 97014 [2021-02-19 20:46:05,141 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:46:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97014 states. [2021-02-19 20:46:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97014 to 86087. [2021-02-19 20:46:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86087 states, 86086 states have (on average 4.639244476453778) internal successors, (399374), 86086 states have internal predecessors, (399374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86087 states to 86087 states and 399374 transitions. [2021-02-19 20:46:07,980 INFO L78 Accepts]: Start accepts. Automaton has 86087 states and 399374 transitions. Word has length 25 [2021-02-19 20:46:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:07,980 INFO L480 AbstractCegarLoop]: Abstraction has 86087 states and 399374 transitions. [2021-02-19 20:46:07,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 86087 states and 399374 transitions. [2021-02-19 20:46:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:08,217 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:08,217 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:08,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:08,438 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:08,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1079977341, now seen corresponding path program 9 times [2021-02-19 20:46:08,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:08,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768882041] [2021-02-19 20:46:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:08,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768882041] [2021-02-19 20:46:08,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110179101] [2021-02-19 20:46:08,465 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:08,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:46:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 20:46:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:08,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:08,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-02-19 20:46:08,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235510234] [2021-02-19 20:46:08,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:46:08,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:08,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:46:08,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:46:08,551 INFO L87 Difference]: Start difference. First operand 86087 states and 399374 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:09,179 INFO L93 Difference]: Finished difference Result 91286 states and 422004 transitions. [2021-02-19 20:46:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:46:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-02-19 20:46:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:09,471 INFO L225 Difference]: With dead ends: 91286 [2021-02-19 20:46:09,471 INFO L226 Difference]: Without dead ends: 91139 [2021-02-19 20:46:09,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:46:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91139 states. [2021-02-19 20:46:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91139 to 89603. [2021-02-19 20:46:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89603 states, 89602 states have (on average 4.643947679739291) internal successors, (416107), 89602 states have internal predecessors, (416107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89603 states to 89603 states and 416107 transitions. [2021-02-19 20:46:12,193 INFO L78 Accepts]: Start accepts. Automaton has 89603 states and 416107 transitions. Word has length 25 [2021-02-19 20:46:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:12,194 INFO L480 AbstractCegarLoop]: Abstraction has 89603 states and 416107 transitions. [2021-02-19 20:46:12,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 89603 states and 416107 transitions. [2021-02-19 20:46:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:12,381 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:12,381 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:12,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:12,582 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash -295639081, now seen corresponding path program 16 times [2021-02-19 20:46:12,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:12,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044878850] [2021-02-19 20:46:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:12,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044878850] [2021-02-19 20:46:12,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915703617] [2021-02-19 20:46:12,665 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:46:12,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:46:12,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:12,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:46:12,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:12,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:12,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:46:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541181245] [2021-02-19 20:46:12,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:46:12,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:46:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:12,748 INFO L87 Difference]: Start difference. First operand 89603 states and 416107 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:13,865 INFO L93 Difference]: Finished difference Result 91226 states and 422297 transitions. [2021-02-19 20:46:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:46:13,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:46:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:14,160 INFO L225 Difference]: With dead ends: 91226 [2021-02-19 20:46:14,160 INFO L226 Difference]: Without dead ends: 91110 [2021-02-19 20:46:14,160 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-02-19 20:46:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 89631. [2021-02-19 20:46:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89631 states, 89630 states have (on average 4.644192792591766) internal successors, (416259), 89630 states have internal predecessors, (416259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89631 states to 89631 states and 416259 transitions. [2021-02-19 20:46:16,829 INFO L78 Accepts]: Start accepts. Automaton has 89631 states and 416259 transitions. Word has length 25 [2021-02-19 20:46:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:16,829 INFO L480 AbstractCegarLoop]: Abstraction has 89631 states and 416259 transitions. [2021-02-19 20:46:16,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 89631 states and 416259 transitions. [2021-02-19 20:46:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:17,020 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:17,020 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:17,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 20:46:17,221 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1061102291, now seen corresponding path program 17 times [2021-02-19 20:46:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:17,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109297510] [2021-02-19 20:46:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:17,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109297510] [2021-02-19 20:46:17,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807290099] [2021-02-19 20:46:17,296 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 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 [2021-02-19 20:46:17,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:46:17,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:46:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:17,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:17,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:46:17,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391500148] [2021-02-19 20:46:17,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:46:17,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:17,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:46:17,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:17,364 INFO L87 Difference]: Start difference. First operand 89631 states and 416259 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:17,918 INFO L93 Difference]: Finished difference Result 91791 states and 424775 transitions. [2021-02-19 20:46:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:46:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:46:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:18,745 INFO L225 Difference]: With dead ends: 91791 [2021-02-19 20:46:18,745 INFO L226 Difference]: Without dead ends: 91695 [2021-02-19 20:46:18,746 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91695 states. [2021-02-19 20:46:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91695 to 89655. [2021-02-19 20:46:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89655 states, 89654 states have (on average 4.644600352466147) internal successors, (416407), 89654 states have internal predecessors, (416407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89655 states to 89655 states and 416407 transitions. [2021-02-19 20:46:20,806 INFO L78 Accepts]: Start accepts. Automaton has 89655 states and 416407 transitions. Word has length 25 [2021-02-19 20:46:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:20,806 INFO L480 AbstractCegarLoop]: Abstraction has 89655 states and 416407 transitions. [2021-02-19 20:46:20,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 89655 states and 416407 transitions. [2021-02-19 20:46:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:20,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:20,991 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:21,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:21,192 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -640736353, now seen corresponding path program 18 times [2021-02-19 20:46:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:21,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897518015] [2021-02-19 20:46:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:21,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897518015] [2021-02-19 20:46:21,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613890171] [2021-02-19 20:46:21,259 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:46:21,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:46:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:21,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:46:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:46:21,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:21,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:46:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563728421] [2021-02-19 20:46:21,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:46:21,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:46:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:21,339 INFO L87 Difference]: Start difference. First operand 89655 states and 416407 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:22,591 INFO L93 Difference]: Finished difference Result 91907 states and 425067 transitions. [2021-02-19 20:46:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:46:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:46:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:22,887 INFO L225 Difference]: With dead ends: 91907 [2021-02-19 20:46:22,887 INFO L226 Difference]: Without dead ends: 91811 [2021-02-19 20:46:22,887 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91811 states. [2021-02-19 20:46:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91811 to 89701. [2021-02-19 20:46:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89701 states, 89700 states have (on average 4.645128205128205) internal successors, (416668), 89700 states have internal predecessors, (416668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89701 states to 89701 states and 416668 transitions. [2021-02-19 20:46:25,665 INFO L78 Accepts]: Start accepts. Automaton has 89701 states and 416668 transitions. Word has length 25 [2021-02-19 20:46:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:25,665 INFO L480 AbstractCegarLoop]: Abstraction has 89701 states and 416668 transitions. [2021-02-19 20:46:25,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 89701 states and 416668 transitions. [2021-02-19 20:46:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:25,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:25,854 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:26,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 20:46:26,054 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1838114273, now seen corresponding path program 10 times [2021-02-19 20:46:26,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:26,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149833141] [2021-02-19 20:46:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:26,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149833141] [2021-02-19 20:46:26,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318148729] [2021-02-19 20:46:26,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:26,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:46:26,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:46:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:26,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:26,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 20:46:26,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192177036] [2021-02-19 20:46:26,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:46:26,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:46:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:46:26,151 INFO L87 Difference]: Start difference. First operand 89701 states and 416668 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:27,496 INFO L93 Difference]: Finished difference Result 103774 states and 473320 transitions. [2021-02-19 20:46:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:46:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-02-19 20:46:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:27,932 INFO L225 Difference]: With dead ends: 103774 [2021-02-19 20:46:27,932 INFO L226 Difference]: Without dead ends: 103672 [2021-02-19 20:46:27,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:46:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103672 states. [2021-02-19 20:46:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103672 to 89725. [2021-02-19 20:46:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89725 states, 89724 states have (on average 4.6442311978957695) internal successors, (416699), 89724 states have internal predecessors, (416699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89725 states to 89725 states and 416699 transitions. [2021-02-19 20:46:30,828 INFO L78 Accepts]: Start accepts. Automaton has 89725 states and 416699 transitions. Word has length 25 [2021-02-19 20:46:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:30,828 INFO L480 AbstractCegarLoop]: Abstraction has 89725 states and 416699 transitions. [2021-02-19 20:46:30,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 89725 states and 416699 transitions. [2021-02-19 20:46:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:31,038 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:31,038 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:31,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 20:46:31,239 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1932931415, now seen corresponding path program 11 times [2021-02-19 20:46:31,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:31,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431907128] [2021-02-19 20:46:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:31,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431907128] [2021-02-19 20:46:31,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967896029] [2021-02-19 20:46:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:31,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:46:31,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:46:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:31,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:31,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 20:46:31,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876199562] [2021-02-19 20:46:31,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:46:31,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:46:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:46:31,350 INFO L87 Difference]: Start difference. First operand 89725 states and 416699 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) [2021-02-19 20:46:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:32,129 INFO L93 Difference]: Finished difference Result 105886 states and 485440 transitions. [2021-02-19 20:46:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:46:32,129 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 25 [2021-02-19 20:46:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:33,087 INFO L225 Difference]: With dead ends: 105886 [2021-02-19 20:46:33,087 INFO L226 Difference]: Without dead ends: 105736 [2021-02-19 20:46:33,088 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:46:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105736 states. [2021-02-19 20:46:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105736 to 98660. [2021-02-19 20:46:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98660 states, 98659 states have (on average 4.635390587782159) internal successors, (457323), 98659 states have internal predecessors, (457323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98660 states to 98660 states and 457323 transitions. [2021-02-19 20:46:35,990 INFO L78 Accepts]: Start accepts. Automaton has 98660 states and 457323 transitions. Word has length 25 [2021-02-19 20:46:35,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:35,990 INFO L480 AbstractCegarLoop]: Abstraction has 98660 states and 457323 transitions. [2021-02-19 20:46:35,990 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) [2021-02-19 20:46:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 98660 states and 457323 transitions. [2021-02-19 20:46:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:36,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:36,246 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:36,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 20:46:36,462 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash -756794187, now seen corresponding path program 12 times [2021-02-19 20:46:36,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:36,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028729023] [2021-02-19 20:46:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:36,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028729023] [2021-02-19 20:46:36,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778660603] [2021-02-19 20:46:36,501 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 [2021-02-19 20:46:36,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:46:36,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:36,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:46:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:36,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:36,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 20:46:36,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93458436] [2021-02-19 20:46:36,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:46:36,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:36,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:46:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:46:36,584 INFO L87 Difference]: Start difference. First operand 98660 states and 457323 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) [2021-02-19 20:46:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:37,247 INFO L93 Difference]: Finished difference Result 103121 states and 475651 transitions. [2021-02-19 20:46:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:46:37,247 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 25 [2021-02-19 20:46:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:37,597 INFO L225 Difference]: With dead ends: 103121 [2021-02-19 20:46:37,598 INFO L226 Difference]: Without dead ends: 103077 [2021-02-19 20:46:37,598 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:46:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103077 states. [2021-02-19 20:46:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103077 to 99354. [2021-02-19 20:46:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99354 states, 99353 states have (on average 4.634495183839441) internal successors, (460451), 99353 states have internal predecessors, (460451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99354 states to 99354 states and 460451 transitions. [2021-02-19 20:46:40,428 INFO L78 Accepts]: Start accepts. Automaton has 99354 states and 460451 transitions. Word has length 25 [2021-02-19 20:46:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:40,428 INFO L480 AbstractCegarLoop]: Abstraction has 99354 states and 460451 transitions. [2021-02-19 20:46:40,428 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) [2021-02-19 20:46:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 99354 states and 460451 transitions. [2021-02-19 20:46:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:40,630 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:40,630 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:40,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 20:46:40,830 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:40,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1374388755, now seen corresponding path program 13 times [2021-02-19 20:46:40,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:40,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20291884] [2021-02-19 20:46:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20291884] [2021-02-19 20:46:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467791283] [2021-02-19 20:46:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:41,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:46:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:41,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:41,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 20:46:41,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369002945] [2021-02-19 20:46:41,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:46:41,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:46:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:46:41,486 INFO L87 Difference]: Start difference. First operand 99354 states and 460451 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:42,429 INFO L93 Difference]: Finished difference Result 127555 states and 580135 transitions. [2021-02-19 20:46:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:46:42,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:46:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:42,858 INFO L225 Difference]: With dead ends: 127555 [2021-02-19 20:46:42,858 INFO L226 Difference]: Without dead ends: 125946 [2021-02-19 20:46:42,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:46:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125946 states. [2021-02-19 20:46:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125946 to 106922. [2021-02-19 20:46:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106922 states, 106921 states have (on average 4.633551874748647) internal successors, (495424), 106921 states have internal predecessors, (495424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106922 states to 106922 states and 495424 transitions. [2021-02-19 20:46:46,648 INFO L78 Accepts]: Start accepts. Automaton has 106922 states and 495424 transitions. Word has length 25 [2021-02-19 20:46:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:46,648 INFO L480 AbstractCegarLoop]: Abstraction has 106922 states and 495424 transitions. [2021-02-19 20:46:46,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 106922 states and 495424 transitions. [2021-02-19 20:46:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:46,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:46,960 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:47,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-02-19 20:46:47,161 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1120523347, now seen corresponding path program 14 times [2021-02-19 20:46:47,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:47,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063779375] [2021-02-19 20:46:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063779375] [2021-02-19 20:46:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534685499] [2021-02-19 20:46:47,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:46:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:46:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:47,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:47,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 20:46:47,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509287238] [2021-02-19 20:46:47,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:46:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:46:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:46:47,261 INFO L87 Difference]: Start difference. First operand 106922 states and 495424 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:48,032 INFO L93 Difference]: Finished difference Result 110892 states and 511383 transitions. [2021-02-19 20:46:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:46:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-02-19 20:46:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:49,151 INFO L225 Difference]: With dead ends: 110892 [2021-02-19 20:46:49,151 INFO L226 Difference]: Without dead ends: 110808 [2021-02-19 20:46:49,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:46:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110808 states. [2021-02-19 20:46:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110808 to 106966. [2021-02-19 20:46:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106966 states, 106965 states have (on average 4.632833169728416) internal successors, (495551), 106965 states have internal predecessors, (495551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106966 states to 106966 states and 495551 transitions. [2021-02-19 20:46:52,112 INFO L78 Accepts]: Start accepts. Automaton has 106966 states and 495551 transitions. Word has length 25 [2021-02-19 20:46:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:52,112 INFO L480 AbstractCegarLoop]: Abstraction has 106966 states and 495551 transitions. [2021-02-19 20:46:52,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 106966 states and 495551 transitions. [2021-02-19 20:46:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:52,472 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:52,473 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:52,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:52,673 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1738635935, now seen corresponding path program 7 times [2021-02-19 20:46:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:52,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287182330] [2021-02-19 20:46:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:52,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287182330] [2021-02-19 20:46:52,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015686523] [2021-02-19 20:46:52,714 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:46:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:52,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:52,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:46:52,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666765861] [2021-02-19 20:46:52,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:46:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:52,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:46:52,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:52,785 INFO L87 Difference]: Start difference. First operand 106966 states and 495551 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:53,506 INFO L93 Difference]: Finished difference Result 109451 states and 505317 transitions. [2021-02-19 20:46:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:46:53,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:46:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:46:54,552 INFO L225 Difference]: With dead ends: 109451 [2021-02-19 20:46:54,552 INFO L226 Difference]: Without dead ends: 109351 [2021-02-19 20:46:54,552 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109351 states. [2021-02-19 20:46:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109351 to 107037. [2021-02-19 20:46:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107037 states, 107036 states have (on average 4.633030008595239) internal successors, (495901), 107036 states have internal predecessors, (495901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107037 states to 107037 states and 495901 transitions. [2021-02-19 20:46:57,904 INFO L78 Accepts]: Start accepts. Automaton has 107037 states and 495901 transitions. Word has length 25 [2021-02-19 20:46:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:46:57,904 INFO L480 AbstractCegarLoop]: Abstraction has 107037 states and 495901 transitions. [2021-02-19 20:46:57,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 107037 states and 495901 transitions. [2021-02-19 20:46:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:46:58,304 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:46:58,304 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:46:58,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:58,518 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:46:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:46:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2032874455, now seen corresponding path program 8 times [2021-02-19 20:46:58,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:46:58,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690969428] [2021-02-19 20:46:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:46:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:46:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:58,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690969428] [2021-02-19 20:46:58,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782812868] [2021-02-19 20:46:58,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:46:58,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:46:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:46:58,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:46:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:46:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:46:58,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:46:58,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:46:58,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356277300] [2021-02-19 20:46:58,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:46:58,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:46:58,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:46:58,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:46:58,711 INFO L87 Difference]: Start difference. First operand 107037 states and 495901 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:46:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:46:59,691 INFO L93 Difference]: Finished difference Result 109725 states and 506658 transitions. [2021-02-19 20:46:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:46:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:46:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:00,182 INFO L225 Difference]: With dead ends: 109725 [2021-02-19 20:47:00,183 INFO L226 Difference]: Without dead ends: 109625 [2021-02-19 20:47:00,183 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109625 states. [2021-02-19 20:47:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109625 to 107084. [2021-02-19 20:47:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107084 states, 107083 states have (on average 4.633321815787753) internal successors, (496150), 107083 states have internal predecessors, (496150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107084 states to 107084 states and 496150 transitions. [2021-02-19 20:47:03,490 INFO L78 Accepts]: Start accepts. Automaton has 107084 states and 496150 transitions. Word has length 25 [2021-02-19 20:47:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:03,490 INFO L480 AbstractCegarLoop]: Abstraction has 107084 states and 496150 transitions. [2021-02-19 20:47:03,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 107084 states and 496150 transitions. [2021-02-19 20:47:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:04,294 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:04,295 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:04,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-02-19 20:47:04,515 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1434520173, now seen corresponding path program 9 times [2021-02-19 20:47:04,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:04,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367650073] [2021-02-19 20:47:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:04,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367650073] [2021-02-19 20:47:04,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057657090] [2021-02-19 20:47:04,600 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:47:04,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:47:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:04,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:04,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:04,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:04,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531758309] [2021-02-19 20:47:04,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:04,684 INFO L87 Difference]: Start difference. First operand 107084 states and 496150 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:05,407 INFO L93 Difference]: Finished difference Result 107964 states and 499581 transitions. [2021-02-19 20:47:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:05,778 INFO L225 Difference]: With dead ends: 107964 [2021-02-19 20:47:05,778 INFO L226 Difference]: Without dead ends: 107888 [2021-02-19 20:47:05,778 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:05,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107888 states. [2021-02-19 20:47:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107888 to 107128. [2021-02-19 20:47:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107128 states, 107127 states have (on average 4.633145705564424) internal successors, (496335), 107127 states have internal predecessors, (496335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107128 states to 107128 states and 496335 transitions. [2021-02-19 20:47:08,912 INFO L78 Accepts]: Start accepts. Automaton has 107128 states and 496335 transitions. Word has length 25 [2021-02-19 20:47:08,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:08,912 INFO L480 AbstractCegarLoop]: Abstraction has 107128 states and 496335 transitions. [2021-02-19 20:47:08,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 107128 states and 496335 transitions. [2021-02-19 20:47:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:09,718 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:09,718 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:09,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:09,932 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:09,932 INFO L82 PathProgramCache]: Analyzing trace with hash 314579707, now seen corresponding path program 10 times [2021-02-19 20:47:09,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:09,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605430131] [2021-02-19 20:47:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:10,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605430131] [2021-02-19 20:47:10,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466312590] [2021-02-19 20:47:10,030 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 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 [2021-02-19 20:47:10,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:47:10,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:10,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:10,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:10,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:10,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788072726] [2021-02-19 20:47:10,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:10,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:10,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:10,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:10,104 INFO L87 Difference]: Start difference. First operand 107128 states and 496335 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:10,854 INFO L93 Difference]: Finished difference Result 108464 states and 501619 transitions. [2021-02-19 20:47:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:11,231 INFO L225 Difference]: With dead ends: 108464 [2021-02-19 20:47:11,231 INFO L226 Difference]: Without dead ends: 108376 [2021-02-19 20:47:11,231 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108376 states. [2021-02-19 20:47:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108376 to 107158. [2021-02-19 20:47:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107158 states, 107157 states have (on average 4.633304403818696) internal successors, (496491), 107157 states have internal predecessors, (496491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107158 states to 107158 states and 496491 transitions. [2021-02-19 20:47:14,351 INFO L78 Accepts]: Start accepts. Automaton has 107158 states and 496491 transitions. Word has length 25 [2021-02-19 20:47:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:14,352 INFO L480 AbstractCegarLoop]: Abstraction has 107158 states and 496491 transitions. [2021-02-19 20:47:14,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 107158 states and 496491 transitions. [2021-02-19 20:47:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:15,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:15,195 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:15,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:15,396 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:15,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2048880701, now seen corresponding path program 11 times [2021-02-19 20:47:15,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:15,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148298249] [2021-02-19 20:47:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:47:15,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148298249] [2021-02-19 20:47:15,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811466885] [2021-02-19 20:47:15,461 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 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 [2021-02-19 20:47:15,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:47:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:47:15,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:15,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:15,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41877548] [2021-02-19 20:47:15,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:15,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:15,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:15,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:15,522 INFO L87 Difference]: Start difference. First operand 107158 states and 496491 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:16,202 INFO L93 Difference]: Finished difference Result 109128 states and 504228 transitions. [2021-02-19 20:47:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:16,579 INFO L225 Difference]: With dead ends: 109128 [2021-02-19 20:47:16,579 INFO L226 Difference]: Without dead ends: 109028 [2021-02-19 20:47:16,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:16,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109028 states. [2021-02-19 20:47:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109028 to 107175. [2021-02-19 20:47:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107175 states, 107174 states have (on average 4.633642487916846) internal successors, (496606), 107174 states have internal predecessors, (496606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107175 states to 107175 states and 496606 transitions. [2021-02-19 20:47:19,735 INFO L78 Accepts]: Start accepts. Automaton has 107175 states and 496606 transitions. Word has length 25 [2021-02-19 20:47:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:19,735 INFO L480 AbstractCegarLoop]: Abstraction has 107175 states and 496606 transitions. [2021-02-19 20:47:19,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 107175 states and 496606 transitions. [2021-02-19 20:47:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:20,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:20,537 INFO L506 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, 1, 1, 1] [2021-02-19 20:47:20,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 20:47:20,750 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash -929998049, now seen corresponding path program 18 times [2021-02-19 20:47:20,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:20,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694774670] [2021-02-19 20:47:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:47:20,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694774670] [2021-02-19 20:47:20,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958025883] [2021-02-19 20:47:20,799 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:20,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:47:20,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:20,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:47:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:47:20,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:20,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 20:47:20,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040044254] [2021-02-19 20:47:20,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:47:20,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:20,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:47:20,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:47:20,885 INFO L87 Difference]: Start difference. First operand 107175 states and 496606 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:21,759 INFO L93 Difference]: Finished difference Result 128749 states and 588125 transitions. [2021-02-19 20:47:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:47:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-02-19 20:47:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:22,217 INFO L225 Difference]: With dead ends: 128749 [2021-02-19 20:47:22,217 INFO L226 Difference]: Without dead ends: 128749 [2021-02-19 20:47:22,217 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:47:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128749 states. [2021-02-19 20:47:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128749 to 111400. [2021-02-19 20:47:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111400 states, 111399 states have (on average 4.634476072496162) internal successors, (516276), 111399 states have internal predecessors, (516276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111400 states to 111400 states and 516276 transitions. [2021-02-19 20:47:26,096 INFO L78 Accepts]: Start accepts. Automaton has 111400 states and 516276 transitions. Word has length 25 [2021-02-19 20:47:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:26,096 INFO L480 AbstractCegarLoop]: Abstraction has 111400 states and 516276 transitions. [2021-02-19 20:47:26,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 111400 states and 516276 transitions. [2021-02-19 20:47:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:26,364 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:26,364 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:26,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 20:47:26,564 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1882414433, now seen corresponding path program 12 times [2021-02-19 20:47:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:26,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078759930] [2021-02-19 20:47:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:26,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078759930] [2021-02-19 20:47:26,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467599510] [2021-02-19 20:47:26,621 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:26,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:47:26,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:26,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:26,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:26,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:26,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:26,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731452770] [2021-02-19 20:47:26,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:26,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:26,700 INFO L87 Difference]: Start difference. First operand 111400 states and 516276 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:28,049 INFO L93 Difference]: Finished difference Result 113930 states and 526272 transitions. [2021-02-19 20:47:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:28,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:28,485 INFO L225 Difference]: With dead ends: 113930 [2021-02-19 20:47:28,485 INFO L226 Difference]: Without dead ends: 113830 [2021-02-19 20:47:28,485 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113830 states. [2021-02-19 20:47:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113830 to 111426. [2021-02-19 20:47:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111426 states, 111425 states have (on average 4.634956248597711) internal successors, (516450), 111425 states have internal predecessors, (516450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111426 states to 111426 states and 516450 transitions. [2021-02-19 20:47:31,593 INFO L78 Accepts]: Start accepts. Automaton has 111426 states and 516450 transitions. Word has length 25 [2021-02-19 20:47:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:31,593 INFO L480 AbstractCegarLoop]: Abstraction has 111426 states and 516450 transitions. [2021-02-19 20:47:31,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 111426 states and 516450 transitions. [2021-02-19 20:47:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:31,819 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:31,819 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:32,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 20:47:32,022 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:32,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1054841765, now seen corresponding path program 13 times [2021-02-19 20:47:32,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:32,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485360747] [2021-02-19 20:47:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:32,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485360747] [2021-02-19 20:47:32,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613031956] [2021-02-19 20:47:32,102 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:32,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:32,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:32,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:32,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640131162] [2021-02-19 20:47:32,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:32,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:32,166 INFO L87 Difference]: Start difference. First operand 111426 states and 516450 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:33,451 INFO L93 Difference]: Finished difference Result 114044 states and 526816 transitions. [2021-02-19 20:47:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:33,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:33,883 INFO L225 Difference]: With dead ends: 114044 [2021-02-19 20:47:33,883 INFO L226 Difference]: Without dead ends: 113968 [2021-02-19 20:47:33,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113968 states. [2021-02-19 20:47:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113968 to 111453. [2021-02-19 20:47:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111453 states, 111452 states have (on average 4.635179269999641) internal successors, (516600), 111452 states have internal predecessors, (516600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111453 states to 111453 states and 516600 transitions. [2021-02-19 20:47:36,807 INFO L78 Accepts]: Start accepts. Automaton has 111453 states and 516600 transitions. Word has length 25 [2021-02-19 20:47:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:36,807 INFO L480 AbstractCegarLoop]: Abstraction has 111453 states and 516600 transitions. [2021-02-19 20:47:36,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 111453 states and 516600 transitions. [2021-02-19 20:47:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:37,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:37,044 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:37,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:37,244 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash 694258115, now seen corresponding path program 14 times [2021-02-19 20:47:37,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:37,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451215671] [2021-02-19 20:47:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:37,875 WARN L202 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-02-19 20:47:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:37,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451215671] [2021-02-19 20:47:37,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631064763] [2021-02-19 20:47:37,889 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:37,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:47:37,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:37,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:38,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:38,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:38,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116059841] [2021-02-19 20:47:38,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:38,076 INFO L87 Difference]: Start difference. First operand 111453 states and 516600 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:38,762 INFO L93 Difference]: Finished difference Result 113240 states and 523560 transitions. [2021-02-19 20:47:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:38,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:39,138 INFO L225 Difference]: With dead ends: 113240 [2021-02-19 20:47:39,139 INFO L226 Difference]: Without dead ends: 113152 [2021-02-19 20:47:39,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113152 states. [2021-02-19 20:47:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113152 to 111462. [2021-02-19 20:47:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111462 states, 111461 states have (on average 4.635424049667597) internal successors, (516669), 111461 states have internal predecessors, (516669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111462 states to 111462 states and 516669 transitions. [2021-02-19 20:47:42,840 INFO L78 Accepts]: Start accepts. Automaton has 111462 states and 516669 transitions. Word has length 25 [2021-02-19 20:47:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:42,840 INFO L480 AbstractCegarLoop]: Abstraction has 111462 states and 516669 transitions. [2021-02-19 20:47:42,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 111462 states and 516669 transitions. [2021-02-19 20:47:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:43,160 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:43,160 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:43,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 20:47:43,382 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1263881569, now seen corresponding path program 15 times [2021-02-19 20:47:43,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:43,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763851942] [2021-02-19 20:47:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:43,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763851942] [2021-02-19 20:47:43,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421727791] [2021-02-19 20:47:43,447 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:47:43,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:47:43,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:43,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:43,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364853655] [2021-02-19 20:47:43,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:43,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:43,559 INFO L87 Difference]: Start difference. First operand 111462 states and 516669 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:45,167 INFO L93 Difference]: Finished difference Result 113979 states and 526514 transitions. [2021-02-19 20:47:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:45,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:45,583 INFO L225 Difference]: With dead ends: 113979 [2021-02-19 20:47:45,583 INFO L226 Difference]: Without dead ends: 113903 [2021-02-19 20:47:45,583 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113903 states. [2021-02-19 20:47:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113903 to 111504. [2021-02-19 20:47:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111504 states, 111503 states have (on average 4.635839394455755) internal successors, (516910), 111503 states have internal predecessors, (516910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111504 states to 111504 states and 516910 transitions. [2021-02-19 20:47:48,515 INFO L78 Accepts]: Start accepts. Automaton has 111504 states and 516910 transitions. Word has length 25 [2021-02-19 20:47:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:48,515 INFO L480 AbstractCegarLoop]: Abstraction has 111504 states and 516910 transitions. [2021-02-19 20:47:48,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 111504 states and 516910 transitions. [2021-02-19 20:47:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:48,752 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:48,752 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:48,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:48,952 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1687353587, now seen corresponding path program 16 times [2021-02-19 20:47:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:48,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528458247] [2021-02-19 20:47:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:49,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528458247] [2021-02-19 20:47:49,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903786784] [2021-02-19 20:47:49,015 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:49,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:47:49,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:49,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:49,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:49,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30851426] [2021-02-19 20:47:49,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:49,778 INFO L87 Difference]: Start difference. First operand 111504 states and 516910 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:50,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:50,502 INFO L93 Difference]: Finished difference Result 113657 states and 525422 transitions. [2021-02-19 20:47:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:50,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:50,883 INFO L225 Difference]: With dead ends: 113657 [2021-02-19 20:47:50,883 INFO L226 Difference]: Without dead ends: 113581 [2021-02-19 20:47:50,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113581 states. [2021-02-19 20:47:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113581 to 111526. [2021-02-19 20:47:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111526 states, 111525 states have (on average 4.636153328850034) internal successors, (517047), 111525 states have internal predecessors, (517047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111526 states to 111526 states and 517047 transitions. [2021-02-19 20:47:53,909 INFO L78 Accepts]: Start accepts. Automaton has 111526 states and 517047 transitions. Word has length 25 [2021-02-19 20:47:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:53,909 INFO L480 AbstractCegarLoop]: Abstraction has 111526 states and 517047 transitions. [2021-02-19 20:47:53,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 111526 states and 517047 transitions. [2021-02-19 20:47:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:47:54,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:47:54,781 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:47:54,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 20:47:54,981 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:47:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:47:54,982 INFO L82 PathProgramCache]: Analyzing trace with hash -858513829, now seen corresponding path program 17 times [2021-02-19 20:47:54,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:47:54,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880698363] [2021-02-19 20:47:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:47:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:47:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:55,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880698363] [2021-02-19 20:47:55,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817355546] [2021-02-19 20:47:55,057 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:47:55,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:47:55,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:47:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:47:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:47:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:47:55,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:47:55,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:47:55,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250358722] [2021-02-19 20:47:55,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:47:55,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:47:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:47:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:55,122 INFO L87 Difference]: Start difference. First operand 111526 states and 517047 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:47:55,815 INFO L93 Difference]: Finished difference Result 113028 states and 522866 transitions. [2021-02-19 20:47:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:47:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:47:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:47:56,196 INFO L225 Difference]: With dead ends: 113028 [2021-02-19 20:47:56,197 INFO L226 Difference]: Without dead ends: 112940 [2021-02-19 20:47:56,197 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:47:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112940 states. [2021-02-19 20:47:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112940 to 111537. [2021-02-19 20:47:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111537 states, 111536 states have (on average 4.636422321044327) internal successors, (517128), 111536 states have internal predecessors, (517128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111537 states to 111537 states and 517128 transitions. [2021-02-19 20:47:59,795 INFO L78 Accepts]: Start accepts. Automaton has 111537 states and 517128 transitions. Word has length 25 [2021-02-19 20:47:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:47:59,795 INFO L480 AbstractCegarLoop]: Abstraction has 111537 states and 517128 transitions. [2021-02-19 20:47:59,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:47:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 111537 states and 517128 transitions. [2021-02-19 20:48:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:48:00,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:00,221 INFO L506 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, 1, 1, 1] [2021-02-19 20:48:00,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:00,426 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:00,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2074320097, now seen corresponding path program 19 times [2021-02-19 20:48:00,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:00,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493537393] [2021-02-19 20:48:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:00,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493537393] [2021-02-19 20:48:00,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613294425] [2021-02-19 20:48:00,451 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:48:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:48:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:00,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:00,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 20:48:00,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050019149] [2021-02-19 20:48:00,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:48:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:48:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:48:00,542 INFO L87 Difference]: Start difference. First operand 111537 states and 517128 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:02,400 INFO L93 Difference]: Finished difference Result 177236 states and 808596 transitions. [2021-02-19 20:48:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:48:02,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 25 [2021-02-19 20:48:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:03,077 INFO L225 Difference]: With dead ends: 177236 [2021-02-19 20:48:03,077 INFO L226 Difference]: Without dead ends: 175971 [2021-02-19 20:48:03,077 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:48:03,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175971 states. [2021-02-19 20:48:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175971 to 133507. [2021-02-19 20:48:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133507 states, 133506 states have (on average 4.642592842269261) internal successors, (619814), 133506 states have internal predecessors, (619814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133507 states to 133507 states and 619814 transitions. [2021-02-19 20:48:07,510 INFO L78 Accepts]: Start accepts. Automaton has 133507 states and 619814 transitions. Word has length 25 [2021-02-19 20:48:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:07,510 INFO L480 AbstractCegarLoop]: Abstraction has 133507 states and 619814 transitions. [2021-02-19 20:48:07,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 133507 states and 619814 transitions. [2021-02-19 20:48:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:48:07,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:07,789 INFO L506 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, 1, 1, 1] [2021-02-19 20:48:07,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:07,989 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:07,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:07,990 INFO L82 PathProgramCache]: Analyzing trace with hash 770921943, now seen corresponding path program 20 times [2021-02-19 20:48:07,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:07,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158810495] [2021-02-19 20:48:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:08,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158810495] [2021-02-19 20:48:08,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:48:08,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 20:48:08,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214736419] [2021-02-19 20:48:08,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:48:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:48:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:48:08,011 INFO L87 Difference]: Start difference. First operand 133507 states and 619814 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:09,562 INFO L93 Difference]: Finished difference Result 148002 states and 681270 transitions. [2021-02-19 20:48:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:48:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:48:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:10,114 INFO L225 Difference]: With dead ends: 148002 [2021-02-19 20:48:10,115 INFO L226 Difference]: Without dead ends: 148002 [2021-02-19 20:48:10,115 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:48:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148002 states. [2021-02-19 20:48:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148002 to 133619. [2021-02-19 20:48:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133619 states, 133618 states have (on average 4.642795132392342) internal successors, (620361), 133618 states have internal predecessors, (620361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133619 states to 133619 states and 620361 transitions. [2021-02-19 20:48:14,274 INFO L78 Accepts]: Start accepts. Automaton has 133619 states and 620361 transitions. Word has length 25 [2021-02-19 20:48:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:14,274 INFO L480 AbstractCegarLoop]: Abstraction has 133619 states and 620361 transitions. [2021-02-19 20:48:14,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 133619 states and 620361 transitions. [2021-02-19 20:48:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:48:14,581 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:14,581 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:48:14,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-02-19 20:48:14,581 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1100069999, now seen corresponding path program 18 times [2021-02-19 20:48:14,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:14,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797299692] [2021-02-19 20:48:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:14,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797299692] [2021-02-19 20:48:14,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329795802] [2021-02-19 20:48:14,629 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:14,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:48:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:48:14,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:48:14,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:48:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:14,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:14,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:48:14,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095512722] [2021-02-19 20:48:14,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:48:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:14,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:48:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:14,700 INFO L87 Difference]: Start difference. First operand 133619 states and 620361 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:16,302 INFO L93 Difference]: Finished difference Result 135907 states and 629439 transitions. [2021-02-19 20:48:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:48:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:48:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:16,839 INFO L225 Difference]: With dead ends: 135907 [2021-02-19 20:48:16,839 INFO L226 Difference]: Without dead ends: 135807 [2021-02-19 20:48:16,839 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135807 states. [2021-02-19 20:48:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135807 to 133633. [2021-02-19 20:48:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133633 states, 133632 states have (on average 4.642959770114943) internal successors, (620448), 133632 states have internal predecessors, (620448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133633 states to 133633 states and 620448 transitions. [2021-02-19 20:48:20,701 INFO L78 Accepts]: Start accepts. Automaton has 133633 states and 620448 transitions. Word has length 25 [2021-02-19 20:48:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:20,701 INFO L480 AbstractCegarLoop]: Abstraction has 133633 states and 620448 transitions. [2021-02-19 20:48:20,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 133633 states and 620448 transitions. [2021-02-19 20:48:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:48:21,137 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:21,137 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:48:21,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:21,337 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:21,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:21,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1927642667, now seen corresponding path program 19 times [2021-02-19 20:48:21,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:21,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890439979] [2021-02-19 20:48:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:21,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890439979] [2021-02-19 20:48:21,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661827876] [2021-02-19 20:48:21,409 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:48:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:48:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:21,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:21,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:48:21,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151078021] [2021-02-19 20:48:21,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:48:21,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:48:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:21,507 INFO L87 Difference]: Start difference. First operand 133633 states and 620448 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:23,185 INFO L93 Difference]: Finished difference Result 134672 states and 624466 transitions. [2021-02-19 20:48:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:48:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:48:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:23,712 INFO L225 Difference]: With dead ends: 134672 [2021-02-19 20:48:23,712 INFO L226 Difference]: Without dead ends: 134596 [2021-02-19 20:48:23,712 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134596 states. [2021-02-19 20:48:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134596 to 133643. [2021-02-19 20:48:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133643 states, 133642 states have (on average 4.642986486284252) internal successors, (620498), 133642 states have internal predecessors, (620498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133643 states to 133643 states and 620498 transitions. [2021-02-19 20:48:28,158 INFO L78 Accepts]: Start accepts. Automaton has 133643 states and 620498 transitions. Word has length 25 [2021-02-19 20:48:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:28,158 INFO L480 AbstractCegarLoop]: Abstraction has 133643 states and 620498 transitions. [2021-02-19 20:48:28,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 133643 states and 620498 transitions. [2021-02-19 20:48:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:48:28,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:28,781 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:48:28,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 20:48:28,994 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:28,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:28,994 INFO L82 PathProgramCache]: Analyzing trace with hash -618224749, now seen corresponding path program 20 times [2021-02-19 20:48:28,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:28,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469565532] [2021-02-19 20:48:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:29,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469565532] [2021-02-19 20:48:29,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964679086] [2021-02-19 20:48:29,072 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:29,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:48:29,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:48:29,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:48:29,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:48:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:29,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:29,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:48:29,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227854669] [2021-02-19 20:48:29,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:48:29,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:48:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:29,151 INFO L87 Difference]: Start difference. First operand 133643 states and 620498 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:30,918 INFO L93 Difference]: Finished difference Result 134961 states and 625681 transitions. [2021-02-19 20:48:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:48:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:48:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:31,432 INFO L225 Difference]: With dead ends: 134961 [2021-02-19 20:48:31,432 INFO L226 Difference]: Without dead ends: 134873 [2021-02-19 20:48:31,432 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134873 states. [2021-02-19 20:48:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134873 to 133647. [2021-02-19 20:48:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133647 states, 133646 states have (on average 4.643101925983569) internal successors, (620532), 133646 states have internal predecessors, (620532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133647 states to 133647 states and 620532 transitions. [2021-02-19 20:48:34,775 INFO L78 Accepts]: Start accepts. Automaton has 133647 states and 620532 transitions. Word has length 25 [2021-02-19 20:48:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:34,775 INFO L480 AbstractCegarLoop]: Abstraction has 133647 states and 620532 transitions. [2021-02-19 20:48:34,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 133647 states and 620532 transitions. [2021-02-19 20:48:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:48:35,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:35,734 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:48:35,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-02-19 20:48:35,950 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1313282139, now seen corresponding path program 21 times [2021-02-19 20:48:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:35,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354385180] [2021-02-19 20:48:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:35,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354385180] [2021-02-19 20:48:35,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668998091] [2021-02-19 20:48:35,991 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:36,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:48:36,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:48:36,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:48:36,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:48:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:48:36,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:36,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 20:48:36,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652564855] [2021-02-19 20:48:36,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:48:36,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:36,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:48:36,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:36,048 INFO L87 Difference]: Start difference. First operand 133647 states and 620532 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:36,842 INFO L93 Difference]: Finished difference Result 135244 states and 626769 transitions. [2021-02-19 20:48:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:48:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:48:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:37,888 INFO L225 Difference]: With dead ends: 135244 [2021-02-19 20:48:37,888 INFO L226 Difference]: Without dead ends: 135144 [2021-02-19 20:48:37,888 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:48:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135144 states. [2021-02-19 20:48:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135144 to 133649. [2021-02-19 20:48:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133649 states, 133648 states have (on average 4.643361666467138) internal successors, (620576), 133648 states have internal predecessors, (620576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133649 states to 133649 states and 620576 transitions. [2021-02-19 20:48:41,292 INFO L78 Accepts]: Start accepts. Automaton has 133649 states and 620576 transitions. Word has length 25 [2021-02-19 20:48:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:41,292 INFO L480 AbstractCegarLoop]: Abstraction has 133649 states and 620576 transitions. [2021-02-19 20:48:41,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 133649 states and 620576 transitions. [2021-02-19 20:48:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:48:41,578 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:41,579 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:48:41,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 20:48:41,779 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1063281705, now seen corresponding path program 19 times [2021-02-19 20:48:41,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:41,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519688562] [2021-02-19 20:48:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:41,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519688562] [2021-02-19 20:48:41,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236388498] [2021-02-19 20:48:41,807 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 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 [2021-02-19 20:48:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:41,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:48:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:48:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:41,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:41,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 20:48:41,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038055144] [2021-02-19 20:48:41,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:48:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:48:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:48:41,883 INFO L87 Difference]: Start difference. First operand 133649 states and 620576 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:43,743 INFO L93 Difference]: Finished difference Result 189940 states and 875162 transitions. [2021-02-19 20:48:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:48:43,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:48:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:44,964 INFO L225 Difference]: With dead ends: 189940 [2021-02-19 20:48:44,964 INFO L226 Difference]: Without dead ends: 188787 [2021-02-19 20:48:44,964 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:48:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188787 states. [2021-02-19 20:48:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188787 to 167453. [2021-02-19 20:48:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167453 states, 167452 states have (on average 4.640458161144687) internal successors, (777054), 167452 states have internal predecessors, (777054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167453 states to 167453 states and 777054 transitions. [2021-02-19 20:48:49,978 INFO L78 Accepts]: Start accepts. Automaton has 167453 states and 777054 transitions. Word has length 27 [2021-02-19 20:48:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:49,978 INFO L480 AbstractCegarLoop]: Abstraction has 167453 states and 777054 transitions. [2021-02-19 20:48:49,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 167453 states and 777054 transitions. [2021-02-19 20:48:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:48:50,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:50,350 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:48:50,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-02-19 20:48:50,550 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:50,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1081529837, now seen corresponding path program 15 times [2021-02-19 20:48:50,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:50,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131949309] [2021-02-19 20:48:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131949309] [2021-02-19 20:48:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155805725] [2021-02-19 20:48:50,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:50,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:48:50,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:48:50,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 20:48:50,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:48:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:50,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:50,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 20:48:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544870181] [2021-02-19 20:48:50,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:48:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:48:50,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:48:50,651 INFO L87 Difference]: Start difference. First operand 167453 states and 777054 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:48:52,701 INFO L93 Difference]: Finished difference Result 197001 states and 908417 transitions. [2021-02-19 20:48:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:48:52,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:48:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:48:54,069 INFO L225 Difference]: With dead ends: 197001 [2021-02-19 20:48:54,070 INFO L226 Difference]: Without dead ends: 196759 [2021-02-19 20:48:54,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:48:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196759 states. [2021-02-19 20:48:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196759 to 168592. [2021-02-19 20:48:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168592 states, 168591 states have (on average 4.64320159439116) internal successors, (782802), 168591 states have internal predecessors, (782802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168592 states to 168592 states and 782802 transitions. [2021-02-19 20:48:59,135 INFO L78 Accepts]: Start accepts. Automaton has 168592 states and 782802 transitions. Word has length 27 [2021-02-19 20:48:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:48:59,136 INFO L480 AbstractCegarLoop]: Abstraction has 168592 states and 782802 transitions. [2021-02-19 20:48:59,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:48:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 168592 states and 782802 transitions. [2021-02-19 20:48:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:48:59,501 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:48:59,501 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:48:59,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:59,703 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:48:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:48:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash -271057705, now seen corresponding path program 9 times [2021-02-19 20:48:59,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:48:59,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343930167] [2021-02-19 20:48:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:48:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:48:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343930167] [2021-02-19 20:48:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084004681] [2021-02-19 20:48:59,765 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:48:59,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:48:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:48:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:48:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:48:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:48:59,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:48:59,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 20:48:59,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376220571] [2021-02-19 20:48:59,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:48:59,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:48:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:48:59,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:48:59,865 INFO L87 Difference]: Start difference. First operand 168592 states and 782802 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:49:01,755 INFO L93 Difference]: Finished difference Result 170470 states and 789922 transitions. [2021-02-19 20:49:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 20:49:01,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:49:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:49:02,868 INFO L225 Difference]: With dead ends: 170470 [2021-02-19 20:49:02,868 INFO L226 Difference]: Without dead ends: 170388 [2021-02-19 20:49:02,868 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:49:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170388 states. [2021-02-19 20:49:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170388 to 168751. [2021-02-19 20:49:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168751 states, 168750 states have (on average 4.643004444444444) internal successors, (783507), 168750 states have internal predecessors, (783507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168751 states to 168751 states and 783507 transitions. [2021-02-19 20:49:07,712 INFO L78 Accepts]: Start accepts. Automaton has 168751 states and 783507 transitions. Word has length 27 [2021-02-19 20:49:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:49:07,712 INFO L480 AbstractCegarLoop]: Abstraction has 168751 states and 783507 transitions. [2021-02-19 20:49:07,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 168751 states and 783507 transitions. [2021-02-19 20:49:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:49:08,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:49:08,123 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:49:08,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:49:08,338 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:49:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:49:08,338 INFO L82 PathProgramCache]: Analyzing trace with hash -25580899, now seen corresponding path program 10 times [2021-02-19 20:49:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:49:08,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001815101] [2021-02-19 20:49:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:49:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:49:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:08,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001815101] [2021-02-19 20:49:08,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59691972] [2021-02-19 20:49:08,409 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:49:08,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:49:08,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:49:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:49:08,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:49:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:08,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:49:08,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 20:49:08,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229720711] [2021-02-19 20:49:08,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:49:08,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:49:08,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:49:08,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:49:08,476 INFO L87 Difference]: Start difference. First operand 168751 states and 783507 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:49:10,619 INFO L93 Difference]: Finished difference Result 169549 states and 786477 transitions. [2021-02-19 20:49:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:49:10,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:49:10,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:49:11,570 INFO L225 Difference]: With dead ends: 169549 [2021-02-19 20:49:11,571 INFO L226 Difference]: Without dead ends: 169467 [2021-02-19 20:49:11,571 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:49:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169467 states. [2021-02-19 20:49:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169467 to 168785. [2021-02-19 20:49:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168785 states, 168784 states have (on average 4.643058583752015) internal successors, (783674), 168784 states have internal predecessors, (783674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168785 states to 168785 states and 783674 transitions. [2021-02-19 20:49:16,567 INFO L78 Accepts]: Start accepts. Automaton has 168785 states and 783674 transitions. Word has length 27 [2021-02-19 20:49:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:49:16,567 INFO L480 AbstractCegarLoop]: Abstraction has 168785 states and 783674 transitions. [2021-02-19 20:49:16,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 168785 states and 783674 transitions. [2021-02-19 20:49:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:49:17,725 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:49:17,725 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:49:17,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 20:49:17,946 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:49:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:49:17,946 INFO L82 PathProgramCache]: Analyzing trace with hash 462635793, now seen corresponding path program 11 times [2021-02-19 20:49:17,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:49:17,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573830711] [2021-02-19 20:49:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:49:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:49:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:49:18,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573830711] [2021-02-19 20:49:18,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075750880] [2021-02-19 20:49:18,043 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 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 [2021-02-19 20:49:18,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:49:18,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:49:18,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:49:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:49:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:49:18,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:49:18,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 20:49:18,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119588606] [2021-02-19 20:49:18,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:49:18,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:49:18,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:49:18,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:49:18,130 INFO L87 Difference]: Start difference. First operand 168785 states and 783674 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:49:19,686 INFO L93 Difference]: Finished difference Result 169941 states and 788114 transitions. [2021-02-19 20:49:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:49:19,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:49:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:49:20,422 INFO L225 Difference]: With dead ends: 169941 [2021-02-19 20:49:20,422 INFO L226 Difference]: Without dead ends: 169877 [2021-02-19 20:49:20,423 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:49:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169877 states. [2021-02-19 20:49:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169877 to 168821. [2021-02-19 20:49:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168821 states, 168820 states have (on average 4.643193934367966) internal successors, (783864), 168820 states have internal predecessors, (783864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168821 states to 168821 states and 783864 transitions. [2021-02-19 20:49:25,121 INFO L78 Accepts]: Start accepts. Automaton has 168821 states and 783864 transitions. Word has length 27 [2021-02-19 20:49:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:49:25,121 INFO L480 AbstractCegarLoop]: Abstraction has 168821 states and 783864 transitions. [2021-02-19 20:49:25,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 168821 states and 783864 transitions. [2021-02-19 20:49:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:49:25,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:49:25,511 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:49:25,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:49:25,711 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:49:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:49:25,711 INFO L82 PathProgramCache]: Analyzing trace with hash 709669467, now seen corresponding path program 1 times [2021-02-19 20:49:25,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:49:25,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767541512] [2021-02-19 20:49:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:49:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:49:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:25,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767541512] [2021-02-19 20:49:25,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945907535] [2021-02-19 20:49:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:49:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:49:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:49:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:49:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:25,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:49:25,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 20:49:25,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013182763] [2021-02-19 20:49:25,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:49:25,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:49:25,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:49:25,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:49:25,838 INFO L87 Difference]: Start difference. First operand 168821 states and 783864 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-02-19 20:49:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:49:28,106 INFO L93 Difference]: Finished difference Result 230838 states and 1058551 transitions. [2021-02-19 20:49:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:49:28,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 27 [2021-02-19 20:49:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:49:29,715 INFO L225 Difference]: With dead ends: 230838 [2021-02-19 20:49:29,715 INFO L226 Difference]: Without dead ends: 229998 [2021-02-19 20:49:29,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:49:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229998 states. [2021-02-19 20:49:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229998 to 215093. [2021-02-19 20:49:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215093 states, 215092 states have (on average 4.630692912800104) internal successors, (996025), 215092 states have internal predecessors, (996025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215093 states to 215093 states and 996025 transitions. [2021-02-19 20:49:36,371 INFO L78 Accepts]: Start accepts. Automaton has 215093 states and 996025 transitions. Word has length 27 [2021-02-19 20:49:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:49:36,372 INFO L480 AbstractCegarLoop]: Abstraction has 215093 states and 996025 transitions. [2021-02-19 20:49:36,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-02-19 20:49:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 215093 states and 996025 transitions. [2021-02-19 20:49:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:49:37,584 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:49:37,584 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:49:37,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:49:37,798 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:49:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:49:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1160403547, now seen corresponding path program 2 times [2021-02-19 20:49:37,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:49:37,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760984417] [2021-02-19 20:49:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:49:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:49:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:37,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760984417] [2021-02-19 20:49:37,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336842965] [2021-02-19 20:49:37,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:49:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:49:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:49:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:49:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:49:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:37,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:49:37,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 20:49:37,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114155330] [2021-02-19 20:49:37,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:49:37,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:49:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:49:37,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:49:37,935 INFO L87 Difference]: Start difference. First operand 215093 states and 996025 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:49:40,370 INFO L93 Difference]: Finished difference Result 295910 states and 1354368 transitions. [2021-02-19 20:49:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:49:40,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 27 [2021-02-19 20:49:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:49:42,297 INFO L225 Difference]: With dead ends: 295910 [2021-02-19 20:49:42,297 INFO L226 Difference]: Without dead ends: 294753 [2021-02-19 20:49:42,297 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:49:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294753 states. [2021-02-19 20:49:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294753 to 265472. [2021-02-19 20:49:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265472 states, 265471 states have (on average 4.6244749897352255) internal successors, (1227664), 265471 states have internal predecessors, (1227664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265472 states to 265472 states and 1227664 transitions. [2021-02-19 20:49:50,641 INFO L78 Accepts]: Start accepts. Automaton has 265472 states and 1227664 transitions. Word has length 27 [2021-02-19 20:49:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:49:50,641 INFO L480 AbstractCegarLoop]: Abstraction has 265472 states and 1227664 transitions. [2021-02-19 20:49:50,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 265472 states and 1227664 transitions. [2021-02-19 20:49:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:49:51,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:49:51,970 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:49:52,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-02-19 20:49:52,170 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:49:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:49:52,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1980056135, now seen corresponding path program 20 times [2021-02-19 20:49:52,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:49:52,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515472137] [2021-02-19 20:49:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:49:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:49:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:52,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515472137] [2021-02-19 20:49:52,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296447478] [2021-02-19 20:49:52,212 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:49:52,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:49:52,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:49:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:49:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:49:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:49:52,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:49:52,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-02-19 20:49:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87688158] [2021-02-19 20:49:52,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 20:49:52,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:49:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 20:49:52,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:49:52,308 INFO L87 Difference]: Start difference. First operand 265472 states and 1227664 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:49:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:49:55,339 INFO L93 Difference]: Finished difference Result 279810 states and 1288038 transitions. [2021-02-19 20:49:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 20:49:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 27 [2021-02-19 20:49:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:49:57,344 INFO L225 Difference]: With dead ends: 279810 [2021-02-19 20:49:57,344 INFO L226 Difference]: Without dead ends: 279761 [2021-02-19 20:49:57,344 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:49:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279761 states. [2021-02-19 20:50:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279761 to 265525. [2021-02-19 20:50:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265525 states, 265524 states have (on average 4.624263720040373) internal successors, (1227853), 265524 states have internal predecessors, (1227853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:50:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265525 states to 265525 states and 1227853 transitions. [2021-02-19 20:50:06,446 INFO L78 Accepts]: Start accepts. Automaton has 265525 states and 1227853 transitions. Word has length 27 [2021-02-19 20:50:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:50:06,446 INFO L480 AbstractCegarLoop]: Abstraction has 265525 states and 1227853 transitions. [2021-02-19 20:50:06,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:50:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 265525 states and 1227853 transitions. [2021-02-19 20:50:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:50:07,118 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:50:07,118 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:50:07,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-02-19 20:50:07,318 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:50:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:50:07,319 INFO L82 PathProgramCache]: Analyzing trace with hash 151126807, now seen corresponding path program 3 times [2021-02-19 20:50:07,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:50:07,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412276325] [2021-02-19 20:50:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:50:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:50:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:50:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412276325] [2021-02-19 20:50:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329988574] [2021-02-19 20:50:07,345 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:50:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:50:07,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:50:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:50:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:50:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:50:07,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:50:07,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 20:50:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778804141] [2021-02-19 20:50:07,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:50:07,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:50:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:50:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:50:07,436 INFO L87 Difference]: Start difference. First operand 265525 states and 1227853 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:50:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:50:11,078 INFO L93 Difference]: Finished difference Result 375739 states and 1717635 transitions. [2021-02-19 20:50:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 20:50:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:50:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-02-19 20:50:13,580 INFO L225 Difference]: With dead ends: 375739 [2021-02-19 20:50:13,580 INFO L226 Difference]: Without dead ends: 373494 [2021-02-19 20:50:13,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:50:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373494 states. [2021-02-19 20:50:14,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-02-19 20:50:14,159 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:50:14,162 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:50:14,162 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:50:14 BasicIcfg [2021-02-19 20:50:14,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:50:14,162 INFO L168 Benchmark]: Toolchain (without parser) took 429491.74 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.5 MB in the beginning and 11.3 GB in the end (delta: -11.0 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. [2021-02-19 20:50:14,163 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:50:14,163 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.84 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:50:14,163 INFO L168 Benchmark]: Boogie Preprocessor took 21.68 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:50:14,163 INFO L168 Benchmark]: RCFGBuilder took 404.96 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 235.9 MB in the end (delta: -2.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-02-19 20:50:14,163 INFO L168 Benchmark]: TraceAbstraction took 429023.54 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.5 MB in the beginning and 11.3 GB in the end (delta: -11.0 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. [2021-02-19 20:50:14,163 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 0.13 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 30.84 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.68 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 404.96 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 235.9 MB in the end (delta: -2.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 429023.54 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.5 MB in the beginning and 11.3 GB in the end (delta: -11.0 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 71). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 428.8s, OverallIterations: 109, TraceHistogramMax: 3, AutomataDifference: 132.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5577 SDtfs, 11117 SDslu, 18497 SDs, 0 SdLazy, 19688 SolverSat, 3227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3419 GetRequests, 2156 SyntacticMatches, 228 SemanticMatches, 1035 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265525occurred in iteration=108, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 228.2s AutomataMinimizationTime, 109 MinimizatonAttempts, 723122 StatesRemovedByMinimization, 108 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 5178 NumberOfCodeBlocks, 5173 NumberOfCodeBlocksAsserted, 304 NumberOfCheckSat, 4968 ConstructedInterpolants, 0 QuantifiedInterpolants, 534650 SizeOfPredicates, 111 NumberOfNonLiveVariables, 7098 ConjunctsInSsa, 1002 ConjunctsInUnsatCore, 210 InterpolantComputations, 10 PerfectInterpolantSequences, 214/812 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