/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/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:23:31,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:23:31,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:23:31,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:23:31,739 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 [2021-05-21 21:23:31,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:23:31,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:23:31,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:23:31,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:23:31,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:23:31,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:23:31,769 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:23:31,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:23:31,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:23:31,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:23:31,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:23:31,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:23:31,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:23:31,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:23:31,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:23:31,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:23:32,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:23:32,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:23:32,003 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:23:32,004 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:23:32,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2021-05-21 21:23:32,005 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2021-05-21 21:23:32,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:23:32,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:23:32,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:23:32,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:23:32,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:23:32,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:23:32,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:23:32,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:23:32,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:23:32,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/1) ... [2021-05-21 21:23:32,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:23:32,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:23:32,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:23:32,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:23:32,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (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 [2021-05-21 21:23:32,108 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:23:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:23:32,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:23:32,109 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:23:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:23:32,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:23:32,109 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:23:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:23:32,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:23:32,110 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:23:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:23:32,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:23:32,110 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-21 21:23:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-21 21:23:32,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-21 21:23:32,111 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:23:32,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:23:32,267 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:23:32,268 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:23:32 BoogieIcfgContainer [2021-05-21 21:23:32,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:23:32,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:23:32,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:23:32,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:23:32,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:23:32" (1/2) ... [2021-05-21 21:23:32,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37287fc5 and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:23:32, skipping insertion in model container [2021-05-21 21:23:32,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:23:32" (2/2) ... [2021-05-21 21:23:32,273 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2021-05-21 21:23:32,276 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:23:32,276 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:23:32,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:23:32,277 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:23:32,309 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-21 21:23:32,322 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 21:23:32,334 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:23:32,334 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:23:32,334 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:23:32,334 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:23:32,334 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:23:32,335 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:23:32,335 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:23:32,335 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:23:32,340 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-05-21 21:23:32,408 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:23:32,429 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:32,429 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:32,429 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash -346285064, now seen corresponding path program 1 times [2021-05-21 21:23:32,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:32,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926614395] [2021-05-21 21:23:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:32,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:32,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926614395] [2021-05-21 21:23:32,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926614395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:32,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:32,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:23:32,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476657158] [2021-05-21 21:23:32,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:23:32,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:32,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:23:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:23:32,592 INFO L87 Difference]: Start difference. First operand has 433 states, 431 states have (on average 3.8445475638051043) internal successors, (1657), 432 states have internal predecessors, (1657), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 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) [2021-05-21 21:23:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:32,649 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2021-05-21 21:23:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:23:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 [2021-05-21 21:23:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:32,666 INFO L225 Difference]: With dead ends: 856 [2021-05-21 21:23:32,666 INFO L226 Difference]: Without dead ends: 731 [2021-05-21 21:23:32,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:23:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-05-21 21:23:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2021-05-21 21:23:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2021-05-21 21:23:32,731 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2021-05-21 21:23:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:32,732 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2021-05-21 21:23:32,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-05-21 21:23:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2021-05-21 21:23:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:23:32,737 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:32,737 INFO L521 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] [2021-05-21 21:23:32,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:23:32,737 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1325518410, now seen corresponding path program 1 times [2021-05-21 21:23:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:32,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845801853] [2021-05-21 21:23:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:32,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:32,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845801853] [2021-05-21 21:23:32,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845801853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:32,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531267919] [2021-05-21 21:23:32,800 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 [2021-05-21 21:23:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:23:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:32,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531267919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:32,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:32,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-21 21:23:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872199726] [2021-05-21 21:23:32,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:23:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:23:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:23:32,930 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2021-05-21 21:23:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:32,996 INFO L93 Difference]: Finished difference Result 1527 states and 5658 transitions. [2021-05-21 21:23:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 [2021-05-21 21:23:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:33,004 INFO L225 Difference]: With dead ends: 1527 [2021-05-21 21:23:33,004 INFO L226 Difference]: Without dead ends: 1527 [2021-05-21 21:23:33,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:23:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-05-21 21:23:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 837. [2021-05-21 21:23:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.77511961722488) internal successors, (3156), 836 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 3156 transitions. [2021-05-21 21:23:33,032 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 3156 transitions. Word has length 23 [2021-05-21 21:23:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:33,032 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 3156 transitions. [2021-05-21 21:23:33,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2021-05-21 21:23:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 3156 transitions. [2021-05-21 21:23:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:23:33,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:33,035 INFO L521 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] [2021-05-21 21:23:33,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 21:23:33,247 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash -622773130, now seen corresponding path program 1 times [2021-05-21 21:23:33,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:33,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047526390] [2021-05-21 21:23:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:33,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:33,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047526390] [2021-05-21 21:23:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047526390] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:33,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:33,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:23:33,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132322902] [2021-05-21 21:23:33,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:23:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:33,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:23:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:33,368 INFO L87 Difference]: Start difference. First operand 837 states and 3156 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) [2021-05-21 21:23:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:33,449 INFO L93 Difference]: Finished difference Result 1186 states and 4244 transitions. [2021-05-21 21:23:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:33,450 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 [2021-05-21 21:23:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:33,456 INFO L225 Difference]: With dead ends: 1186 [2021-05-21 21:23:33,456 INFO L226 Difference]: Without dead ends: 1076 [2021-05-21 21:23:33,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:23:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-05-21 21:23:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 805. [2021-05-21 21:23:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.798507462686567) internal successors, (3054), 804 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 3054 transitions. [2021-05-21 21:23:33,475 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 3054 transitions. Word has length 23 [2021-05-21 21:23:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:33,475 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 3054 transitions. [2021-05-21 21:23:33,475 INFO L483 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) [2021-05-21 21:23:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 3054 transitions. [2021-05-21 21:23:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:23:33,477 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:33,477 INFO L521 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] [2021-05-21 21:23:33,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:23:33,477 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1350746626, now seen corresponding path program 2 times [2021-05-21 21:23:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:33,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664980374] [2021-05-21 21:23:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:33,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:33,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664980374] [2021-05-21 21:23:33,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664980374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:33,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:33,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:23:33,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481663560] [2021-05-21 21:23:33,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:23:33,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:23:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:23:33,532 INFO L87 Difference]: Start difference. First operand 805 states and 3054 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) [2021-05-21 21:23:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:33,566 INFO L93 Difference]: Finished difference Result 1022 states and 3745 transitions. [2021-05-21 21:23:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:23:33,566 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 [2021-05-21 21:23:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:33,572 INFO L225 Difference]: With dead ends: 1022 [2021-05-21 21:23:33,572 INFO L226 Difference]: Without dead ends: 1022 [2021-05-21 21:23:33,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-05-21 21:23:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 847. [2021-05-21 21:23:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.75177304964539) internal successors, (3174), 846 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 3174 transitions. [2021-05-21 21:23:33,597 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 3174 transitions. Word has length 23 [2021-05-21 21:23:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:33,597 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 3174 transitions. [2021-05-21 21:23:33,597 INFO L483 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) [2021-05-21 21:23:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 3174 transitions. [2021-05-21 21:23:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:23:33,599 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:33,600 INFO L521 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] [2021-05-21 21:23:33,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:23:33,600 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 84290046, now seen corresponding path program 2 times [2021-05-21 21:23:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:33,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834322391] [2021-05-21 21:23:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:33,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:33,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834322391] [2021-05-21 21:23:33,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834322391] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:33,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:33,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:23:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962230925] [2021-05-21 21:23:33,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:23:33,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:33,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:23:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:33,659 INFO L87 Difference]: Start difference. First operand 847 states and 3174 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) [2021-05-21 21:23:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:33,732 INFO L93 Difference]: Finished difference Result 1324 states and 4824 transitions. [2021-05-21 21:23:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:33,732 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 [2021-05-21 21:23:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:33,739 INFO L225 Difference]: With dead ends: 1324 [2021-05-21 21:23:33,739 INFO L226 Difference]: Without dead ends: 1288 [2021-05-21 21:23:33,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:23:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-05-21 21:23:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 893. [2021-05-21 21:23:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.7387892376681613) internal successors, (3335), 892 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3335 transitions. [2021-05-21 21:23:33,761 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3335 transitions. Word has length 23 [2021-05-21 21:23:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:33,761 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3335 transitions. [2021-05-21 21:23:33,761 INFO L483 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) [2021-05-21 21:23:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3335 transitions. [2021-05-21 21:23:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:23:33,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:33,765 INFO L521 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] [2021-05-21 21:23:33,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:23:33,765 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash 227514278, now seen corresponding path program 3 times [2021-05-21 21:23:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:33,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518873380] [2021-05-21 21:23:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:33,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:33,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518873380] [2021-05-21 21:23:33,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518873380] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:33,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:33,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:23:33,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144587315] [2021-05-21 21:23:33,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:23:33,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:23:33,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:23:33,813 INFO L87 Difference]: Start difference. First operand 893 states and 3335 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) [2021-05-21 21:23:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:33,858 INFO L93 Difference]: Finished difference Result 1414 states and 5206 transitions. [2021-05-21 21:23:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:23:33,859 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 [2021-05-21 21:23:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:33,866 INFO L225 Difference]: With dead ends: 1414 [2021-05-21 21:23:33,866 INFO L226 Difference]: Without dead ends: 1392 [2021-05-21 21:23:33,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-05-21 21:23:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2021-05-21 21:23:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.8140794223826715) internal successors, (4226), 1108 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4226 transitions. [2021-05-21 21:23:33,905 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4226 transitions. Word has length 23 [2021-05-21 21:23:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:33,906 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 4226 transitions. [2021-05-21 21:23:33,906 INFO L483 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) [2021-05-21 21:23:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4226 transitions. [2021-05-21 21:23:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:23:33,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:33,909 INFO L521 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] [2021-05-21 21:23:33,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 21:23:33,909 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash -162447450, now seen corresponding path program 4 times [2021-05-21 21:23:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:33,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791977321] [2021-05-21 21:23:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:33,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791977321] [2021-05-21 21:23:33,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791977321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:33,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:33,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:23:33,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458756798] [2021-05-21 21:23:33,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:23:33,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:33,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:23:33,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:33,967 INFO L87 Difference]: Start difference. First operand 1109 states and 4226 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) [2021-05-21 21:23:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:34,008 INFO L93 Difference]: Finished difference Result 1451 states and 5463 transitions. [2021-05-21 21:23:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:23:34,008 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 [2021-05-21 21:23:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:34,015 INFO L225 Difference]: With dead ends: 1451 [2021-05-21 21:23:34,015 INFO L226 Difference]: Without dead ends: 1451 [2021-05-21 21:23:34,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-05-21 21:23:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1131. [2021-05-21 21:23:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.8230088495575223) internal successors, (4320), 1130 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4320 transitions. [2021-05-21 21:23:34,042 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4320 transitions. Word has length 23 [2021-05-21 21:23:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:34,042 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 4320 transitions. [2021-05-21 21:23:34,042 INFO L483 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) [2021-05-21 21:23:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4320 transitions. [2021-05-21 21:23:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:23:34,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:34,045 INFO L521 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] [2021-05-21 21:23:34,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 21:23:34,045 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:34,046 INFO L82 PathProgramCache]: Analyzing trace with hash 770281974, now seen corresponding path program 1 times [2021-05-21 21:23:34,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:34,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180671952] [2021-05-21 21:23:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180671952] [2021-05-21 21:23:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180671952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454921206] [2021-05-21 21:23:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:23:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:23:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:34,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454921206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:34,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:34,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-05-21 21:23:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148838477] [2021-05-21 21:23:34,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:23:34,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:23:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:23:34,204 INFO L87 Difference]: Start difference. First operand 1131 states and 4320 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-05-21 21:23:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:34,268 INFO L93 Difference]: Finished difference Result 1625 states and 6043 transitions. [2021-05-21 21:23:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 [2021-05-21 21:23:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:34,275 INFO L225 Difference]: With dead ends: 1625 [2021-05-21 21:23:34,275 INFO L226 Difference]: Without dead ends: 1546 [2021-05-21 21:23:34,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:23:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-05-21 21:23:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1118. [2021-05-21 21:23:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.819158460161146) internal successors, (4266), 1117 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4266 transitions. [2021-05-21 21:23:34,299 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4266 transitions. Word has length 25 [2021-05-21 21:23:34,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:34,299 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4266 transitions. [2021-05-21 21:23:34,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-05-21 21:23:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4266 transitions. [2021-05-21 21:23:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:23:34,302 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:34,302 INFO L521 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] [2021-05-21 21:23:34,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:34,518 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:34,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1325590424, now seen corresponding path program 2 times [2021-05-21 21:23:34,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:34,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671442188] [2021-05-21 21:23:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:34,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:34,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671442188] [2021-05-21 21:23:34,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671442188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:34,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:34,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:23:34,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902495116] [2021-05-21 21:23:34,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:23:34,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:23:34,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:23:34,558 INFO L87 Difference]: Start difference. First operand 1118 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:34,577 INFO L93 Difference]: Finished difference Result 1338 states and 5014 transitions. [2021-05-21 21:23:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:23:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:23:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:34,584 INFO L225 Difference]: With dead ends: 1338 [2021-05-21 21:23:34,584 INFO L226 Difference]: Without dead ends: 1338 [2021-05-21 21:23:34,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:23:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-05-21 21:23:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1133. [2021-05-21 21:23:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.795936395759717) internal successors, (4297), 1132 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4297 transitions. [2021-05-21 21:23:34,607 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4297 transitions. Word has length 25 [2021-05-21 21:23:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:34,607 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 4297 transitions. [2021-05-21 21:23:34,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4297 transitions. [2021-05-21 21:23:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:23:34,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:34,610 INFO L521 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] [2021-05-21 21:23:34,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 21:23:34,610 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:34,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1169689052, now seen corresponding path program 1 times [2021-05-21 21:23:34,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:34,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754709468] [2021-05-21 21:23:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:34,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:34,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754709468] [2021-05-21 21:23:34,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754709468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:34,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352224185] [2021-05-21 21:23:34,661 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 [2021-05-21 21:23:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:23:34,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352224185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:34,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:34,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-21 21:23:34,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911666987] [2021-05-21 21:23:34,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:23:34,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:23:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:23:34,741 INFO L87 Difference]: Start difference. First operand 1133 states and 4297 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) [2021-05-21 21:23:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:34,794 INFO L93 Difference]: Finished difference Result 1711 states and 6371 transitions. [2021-05-21 21:23:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:34,794 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 [2021-05-21 21:23:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:34,819 INFO L225 Difference]: With dead ends: 1711 [2021-05-21 21:23:34,819 INFO L226 Difference]: Without dead ends: 1659 [2021-05-21 21:23:34,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:23:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-05-21 21:23:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1105. [2021-05-21 21:23:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.7871376811594204) internal successors, (4181), 1104 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4181 transitions. [2021-05-21 21:23:34,845 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4181 transitions. Word has length 25 [2021-05-21 21:23:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:34,845 INFO L482 AbstractCegarLoop]: Abstraction has 1105 states and 4181 transitions. [2021-05-21 21:23:34,845 INFO L483 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) [2021-05-21 21:23:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4181 transitions. [2021-05-21 21:23:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:23:34,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:34,848 INFO L521 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] [2021-05-21 21:23:35,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:23:35,065 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:35,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1094939800, now seen corresponding path program 3 times [2021-05-21 21:23:35,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:35,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196427186] [2021-05-21 21:23:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:35,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:35,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196427186] [2021-05-21 21:23:35,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196427186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:23:35,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:23:35,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:23:35,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221483772] [2021-05-21 21:23:35,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:23:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:23:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:23:35,087 INFO L87 Difference]: Start difference. First operand 1105 states and 4181 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:35,117 INFO L93 Difference]: Finished difference Result 1111 states and 4195 transitions. [2021-05-21 21:23:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:23:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:23:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:35,120 INFO L225 Difference]: With dead ends: 1111 [2021-05-21 21:23:35,120 INFO L226 Difference]: Without dead ends: 946 [2021-05-21 21:23:35,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-05-21 21:23:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 858. [2021-05-21 21:23:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2021-05-21 21:23:35,142 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2021-05-21 21:23:35,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:35,142 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2021-05-21 21:23:35,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2021-05-21 21:23:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:23:35,144 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:35,145 INFO L521 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, 1, 1] [2021-05-21 21:23:35,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 21:23:35,145 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1165509964, now seen corresponding path program 1 times [2021-05-21 21:23:35,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:35,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969339864] [2021-05-21 21:23:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:35,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969339864] [2021-05-21 21:23:35,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969339864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477619871] [2021-05-21 21:23:35,179 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 [2021-05-21 21:23:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:23:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:35,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477619871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:35,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:35,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-21 21:23:35,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907916669] [2021-05-21 21:23:35,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:23:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:23:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:23:35,272 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-05-21 21:23:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:35,330 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2021-05-21 21:23:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 27 [2021-05-21 21:23:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:35,344 INFO L225 Difference]: With dead ends: 2765 [2021-05-21 21:23:35,344 INFO L226 Difference]: Without dead ends: 2631 [2021-05-21 21:23:35,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:23:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-05-21 21:23:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2021-05-21 21:23:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2021-05-21 21:23:35,389 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2021-05-21 21:23:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:35,389 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2021-05-21 21:23:35,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-05-21 21:23:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2021-05-21 21:23:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:23:35,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:35,393 INFO L521 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, 1, 1] [2021-05-21 21:23:35,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:35,610 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1684408818, now seen corresponding path program 2 times [2021-05-21 21:23:35,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:35,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974110827] [2021-05-21 21:23:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:23:35,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:35,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974110827] [2021-05-21 21:23:35,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974110827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:35,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086798506] [2021-05-21 21:23:35,664 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 [2021-05-21 21:23:35,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:23:35,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:35,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:35,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 21:23:35,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086798506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:35,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:35,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-05-21 21:23:35,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566494412] [2021-05-21 21:23:35,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:23:35,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:23:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:23:35,758 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:35,840 INFO L93 Difference]: Finished difference Result 2660 states and 10383 transitions. [2021-05-21 21:23:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 21:23:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:35,848 INFO L225 Difference]: With dead ends: 2660 [2021-05-21 21:23:35,848 INFO L226 Difference]: Without dead ends: 2660 [2021-05-21 21:23:35,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:23:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-05-21 21:23:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2137. [2021-05-21 21:23:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2021-05-21 21:23:35,901 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2021-05-21 21:23:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:35,901 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2021-05-21 21:23:35,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2021-05-21 21:23:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:23:35,906 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:35,906 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:36,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 21:23:36,125 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1964960968, now seen corresponding path program 1 times [2021-05-21 21:23:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:36,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987200230] [2021-05-21 21:23:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:36,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:36,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987200230] [2021-05-21 21:23:36,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987200230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:36,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191371428] [2021-05-21 21:23:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 21:23:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:36,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:23:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:36,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191371428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:36,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:36,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 21:23:36,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521235743] [2021-05-21 21:23:36,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:23:36,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:36,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:23:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:23:36,283 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:36,337 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2021-05-21 21:23:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:23:36,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 21:23:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:36,344 INFO L225 Difference]: With dead ends: 2794 [2021-05-21 21:23:36,344 INFO L226 Difference]: Without dead ends: 2640 [2021-05-21 21:23:36,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:23:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-05-21 21:23:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2021-05-21 21:23:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2021-05-21 21:23:36,383 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2021-05-21 21:23:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:36,383 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2021-05-21 21:23:36,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2021-05-21 21:23:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:23:36,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:36,387 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:36,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:36,601 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:36,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:36,602 INFO L82 PathProgramCache]: Analyzing trace with hash 659344036, now seen corresponding path program 2 times [2021-05-21 21:23:36,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:36,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798692589] [2021-05-21 21:23:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:36,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:36,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798692589] [2021-05-21 21:23:36,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798692589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:36,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758743207] [2021-05-21 21:23:36,650 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 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 [2021-05-21 21:23:36,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:23:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:23:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:36,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758743207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:36,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:36,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-21 21:23:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021976191] [2021-05-21 21:23:36,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:23:36,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:23:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:23:36,734 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) 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) [2021-05-21 21:23:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:36,811 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2021-05-21 21:23:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:23:36,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) 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 29 [2021-05-21 21:23:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:36,824 INFO L225 Difference]: With dead ends: 5257 [2021-05-21 21:23:36,824 INFO L226 Difference]: Without dead ends: 4937 [2021-05-21 21:23:36,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:23:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-05-21 21:23:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2021-05-21 21:23:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2021-05-21 21:23:36,885 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2021-05-21 21:23:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:36,885 INFO L482 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2021-05-21 21:23:36,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) 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) [2021-05-21 21:23:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2021-05-21 21:23:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:23:36,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:36,892 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:37,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:23:37,110 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:37,110 INFO L82 PathProgramCache]: Analyzing trace with hash 958895088, now seen corresponding path program 3 times [2021-05-21 21:23:37,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:37,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610220171] [2021-05-21 21:23:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:37,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:37,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610220171] [2021-05-21 21:23:37,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610220171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:37,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66415453] [2021-05-21 21:23:37,150 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 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 [2021-05-21 21:23:37,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:23:37,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:37,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:37,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66415453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:37,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:37,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-21 21:23:37,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107162467] [2021-05-21 21:23:37,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:23:37,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:23:37,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:23:37,263 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:37,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:37,751 INFO L93 Difference]: Finished difference Result 11182 states and 42971 transitions. [2021-05-21 21:23:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:23:37,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:23:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:37,779 INFO L225 Difference]: With dead ends: 11182 [2021-05-21 21:23:37,779 INFO L226 Difference]: Without dead ends: 10794 [2021-05-21 21:23:37,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:23:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2021-05-21 21:23:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 5776. [2021-05-21 21:23:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2021-05-21 21:23:37,919 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2021-05-21 21:23:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:37,920 INFO L482 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2021-05-21 21:23:37,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2021-05-21 21:23:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:23:37,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:37,936 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:38,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 21:23:38,154 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1392155722, now seen corresponding path program 4 times [2021-05-21 21:23:38,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:38,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535355634] [2021-05-21 21:23:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:38,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535355634] [2021-05-21 21:23:38,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535355634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672067309] [2021-05-21 21:23:38,193 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 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 [2021-05-21 21:23:38,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:23:38,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:38,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672067309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:38,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:38,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 21:23:38,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843036158] [2021-05-21 21:23:38,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:23:38,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:23:38,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:23:38,327 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:38,525 INFO L93 Difference]: Finished difference Result 14551 states and 57252 transitions. [2021-05-21 21:23:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:23:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:23:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:38,561 INFO L225 Difference]: With dead ends: 14551 [2021-05-21 21:23:38,561 INFO L226 Difference]: Without dead ends: 13651 [2021-05-21 21:23:38,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:23:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-05-21 21:23:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 8849. [2021-05-21 21:23:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2021-05-21 21:23:38,818 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2021-05-21 21:23:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:38,818 INFO L482 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2021-05-21 21:23:38,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2021-05-21 21:23:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:23:38,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:38,836 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:39,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:23:39,054 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash 291561130, now seen corresponding path program 5 times [2021-05-21 21:23:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:39,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982918545] [2021-05-21 21:23:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:39,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:39,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982918545] [2021-05-21 21:23:39,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982918545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:39,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658452093] [2021-05-21 21:23:39,139 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 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 [2021-05-21 21:23:39,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:23:39,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:39,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:39,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658452093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:39,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:39,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-21 21:23:39,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568863712] [2021-05-21 21:23:39,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:23:39,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:23:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:23:39,253 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:39,616 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2021-05-21 21:23:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:23:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:23:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:39,675 INFO L225 Difference]: With dead ends: 24527 [2021-05-21 21:23:39,675 INFO L226 Difference]: Without dead ends: 24223 [2021-05-21 21:23:39,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:23:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2021-05-21 21:23:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2021-05-21 21:23:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2021-05-21 21:23:40,158 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2021-05-21 21:23:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:40,158 INFO L482 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2021-05-21 21:23:40,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2021-05-21 21:23:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:23:40,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:40,185 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:40,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 21:23:40,403 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:40,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:40,403 INFO L82 PathProgramCache]: Analyzing trace with hash -166486102, now seen corresponding path program 6 times [2021-05-21 21:23:40,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:40,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611349691] [2021-05-21 21:23:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:40,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611349691] [2021-05-21 21:23:40,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611349691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660790535] [2021-05-21 21:23:40,525 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 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 [2021-05-21 21:23:40,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:23:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:40,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:23:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:40,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660790535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:40,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:40,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-21 21:23:40,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807702700] [2021-05-21 21:23:40,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:23:40,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:40,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:23:40,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:23:40,686 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:41,348 INFO L93 Difference]: Finished difference Result 61524 states and 263492 transitions. [2021-05-21 21:23:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:23:41,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:23:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:41,623 INFO L225 Difference]: With dead ends: 61524 [2021-05-21 21:23:41,623 INFO L226 Difference]: Without dead ends: 60380 [2021-05-21 21:23:41,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:23:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60380 states. [2021-05-21 21:23:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60380 to 33143. [2021-05-21 21:23:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2021-05-21 21:23:42,900 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2021-05-21 21:23:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:42,901 INFO L482 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2021-05-21 21:23:42,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2021-05-21 21:23:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:23:43,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:43,022 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:43,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:43,222 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:43,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1888374044, now seen corresponding path program 7 times [2021-05-21 21:23:43,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:43,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143581059] [2021-05-21 21:23:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:43,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:43,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143581059] [2021-05-21 21:23:43,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143581059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:43,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016150830] [2021-05-21 21:23:43,260 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:23:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:23:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:23:43,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016150830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:43,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:43,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:23:43,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662614325] [2021-05-21 21:23:43,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:23:43,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:23:43,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:23:43,353 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:43,769 INFO L93 Difference]: Finished difference Result 44403 states and 202376 transitions. [2021-05-21 21:23:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:23:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:23:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:43,991 INFO L225 Difference]: With dead ends: 44403 [2021-05-21 21:23:43,991 INFO L226 Difference]: Without dead ends: 44271 [2021-05-21 21:23:43,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:23:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44271 states. [2021-05-21 21:23:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44271 to 33850. [2021-05-21 21:23:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2021-05-21 21:23:44,882 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2021-05-21 21:23:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:44,882 INFO L482 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2021-05-21 21:23:44,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2021-05-21 21:23:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:23:44,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:44,960 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:45,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:45,174 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash -704126048, now seen corresponding path program 8 times [2021-05-21 21:23:45,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:45,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347338037] [2021-05-21 21:23:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:45,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347338037] [2021-05-21 21:23:45,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347338037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257905441] [2021-05-21 21:23:45,437 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 [2021-05-21 21:23:45,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:23:45,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:45,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257905441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:45,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:45,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 21:23:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278487686] [2021-05-21 21:23:45,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:23:45,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:23:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:23:45,573 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:46,641 INFO L93 Difference]: Finished difference Result 66403 states and 284462 transitions. [2021-05-21 21:23:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 21:23:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:23:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:46,830 INFO L225 Difference]: With dead ends: 66403 [2021-05-21 21:23:46,830 INFO L226 Difference]: Without dead ends: 64922 [2021-05-21 21:23:46,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:23:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64922 states. [2021-05-21 21:23:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64922 to 32872. [2021-05-21 21:23:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2021-05-21 21:23:47,763 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2021-05-21 21:23:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:47,763 INFO L482 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2021-05-21 21:23:47,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2021-05-21 21:23:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:23:48,049 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:48,049 INFO L521 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, 1, 1, 1, 1] [2021-05-21 21:23:48,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 21:23:48,249 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 101455272, now seen corresponding path program 9 times [2021-05-21 21:23:48,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:48,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108286267] [2021-05-21 21:23:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:48,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108286267] [2021-05-21 21:23:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108286267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592488657] [2021-05-21 21:23:48,292 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 [2021-05-21 21:23:48,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:23:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592488657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:48,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:48,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:23:48,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946326390] [2021-05-21 21:23:48,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:23:48,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:23:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:23:48,384 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:49,213 INFO L93 Difference]: Finished difference Result 67837 states and 295603 transitions. [2021-05-21 21:23:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:23:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:23:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:49,423 INFO L225 Difference]: With dead ends: 67837 [2021-05-21 21:23:49,423 INFO L226 Difference]: Without dead ends: 67411 [2021-05-21 21:23:49,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:23:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67411 states. [2021-05-21 21:23:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67411 to 32800. [2021-05-21 21:23:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2021-05-21 21:23:50,671 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2021-05-21 21:23:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:50,671 INFO L482 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2021-05-21 21:23:50,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2021-05-21 21:23:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:23:50,733 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:50,733 INFO L521 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, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:50,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:50,934 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 903160218, now seen corresponding path program 10 times [2021-05-21 21:23:50,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:50,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137423493] [2021-05-21 21:23:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:50,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137423493] [2021-05-21 21:23:50,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137423493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954612768] [2021-05-21 21:23:50,978 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 [2021-05-21 21:23:51,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:23:51,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:23:51,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954612768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:51,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:51,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:23:51,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478332345] [2021-05-21 21:23:51,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:23:51,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:23:51,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:23:51,066 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:51,407 INFO L93 Difference]: Finished difference Result 54540 states and 247085 transitions. [2021-05-21 21:23:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:23:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:23:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:51,854 INFO L225 Difference]: With dead ends: 54540 [2021-05-21 21:23:51,854 INFO L226 Difference]: Without dead ends: 54365 [2021-05-21 21:23:51,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:23:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54365 states. [2021-05-21 21:23:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54365 to 44066. [2021-05-21 21:23:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2021-05-21 21:23:52,979 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2021-05-21 21:23:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:52,979 INFO L482 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2021-05-21 21:23:52,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2021-05-21 21:23:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:23:53,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:53,078 INFO L521 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, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:53,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 21:23:53,278 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash 108399622, now seen corresponding path program 11 times [2021-05-21 21:23:53,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:53,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366098782] [2021-05-21 21:23:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:53,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366098782] [2021-05-21 21:23:53,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366098782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502660089] [2021-05-21 21:23:53,334 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 [2021-05-21 21:23:53,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:23:53,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:23:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:23:53,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502660089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:53,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:53,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:23:53,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896066253] [2021-05-21 21:23:53,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:23:53,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:53,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:23:53,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:23:53,433 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:53,840 INFO L93 Difference]: Finished difference Result 55576 states and 253213 transitions. [2021-05-21 21:23:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 21:23:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:23:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:54,334 INFO L225 Difference]: With dead ends: 55576 [2021-05-21 21:23:54,335 INFO L226 Difference]: Without dead ends: 55382 [2021-05-21 21:23:54,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:23:54,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55382 states. [2021-05-21 21:23:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55382 to 44604. [2021-05-21 21:23:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44604 states, 44603 states have (on average 4.71378606820169) internal successors, (210249), 44603 states have internal predecessors, (210249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44604 states to 44604 states and 210249 transitions. [2021-05-21 21:23:55,479 INFO L78 Accepts]: Start accepts. Automaton has 44604 states and 210249 transitions. Word has length 33 [2021-05-21 21:23:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:55,479 INFO L482 AbstractCegarLoop]: Abstraction has 44604 states and 210249 transitions. [2021-05-21 21:23:55,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44604 states and 210249 transitions. [2021-05-21 21:23:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:23:55,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:55,566 INFO L521 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, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:55,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:55,767 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1275302974, now seen corresponding path program 12 times [2021-05-21 21:23:55,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:55,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069670704] [2021-05-21 21:23:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:55,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069670704] [2021-05-21 21:23:55,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069670704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257683211] [2021-05-21 21:23:55,813 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 [2021-05-21 21:23:55,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:23:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:23:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:23:55,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257683211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:55,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:55,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 21:23:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254965621] [2021-05-21 21:23:55,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:23:55,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:23:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:23:55,902 INFO L87 Difference]: Start difference. First operand 44604 states and 210249 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:57,462 INFO L93 Difference]: Finished difference Result 141398 states and 642861 transitions. [2021-05-21 21:23:57,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:23:57,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:23:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:58,308 INFO L225 Difference]: With dead ends: 141398 [2021-05-21 21:23:58,308 INFO L226 Difference]: Without dead ends: 140699 [2021-05-21 21:23:58,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:23:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140699 states. [2021-05-21 21:24:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140699 to 85571. [2021-05-21 21:24:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85571 states, 85570 states have (on average 4.762369989482295) internal successors, (407516), 85570 states have internal predecessors, (407516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85571 states to 85571 states and 407516 transitions. [2021-05-21 21:24:01,232 INFO L78 Accepts]: Start accepts. Automaton has 85571 states and 407516 transitions. Word has length 33 [2021-05-21 21:24:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:01,232 INFO L482 AbstractCegarLoop]: Abstraction has 85571 states and 407516 transitions. [2021-05-21 21:24:01,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 85571 states and 407516 transitions. [2021-05-21 21:24:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:24:01,412 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:01,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-05-21 21:24:01,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:24:01,617 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:01,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1471051102, now seen corresponding path program 13 times [2021-05-21 21:24:01,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:01,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498626895] [2021-05-21 21:24:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:24:01,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498626895] [2021-05-21 21:24:01,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498626895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147224827] [2021-05-21 21:24:01,670 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:24:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:24:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:24:01,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147224827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:01,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:01,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-05-21 21:24:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826119214] [2021-05-21 21:24:01,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:24:01,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:01,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:24:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:24:01,775 INFO L87 Difference]: Start difference. First operand 85571 states and 407516 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:02,325 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-21 21:24:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:04,159 INFO L93 Difference]: Finished difference Result 205700 states and 956596 transitions. [2021-05-21 21:24:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:24:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:24:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:04,979 INFO L225 Difference]: With dead ends: 205700 [2021-05-21 21:24:04,979 INFO L226 Difference]: Without dead ends: 204198 [2021-05-21 21:24:04,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:24:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204198 states. [2021-05-21 21:24:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204198 to 179419. [2021-05-21 21:24:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179419 states, 179418 states have (on average 4.730361502190416) internal successors, (848712), 179418 states have internal predecessors, (848712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179419 states to 179419 states and 848712 transitions. [2021-05-21 21:24:11,077 INFO L78 Accepts]: Start accepts. Automaton has 179419 states and 848712 transitions. Word has length 35 [2021-05-21 21:24:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:11,077 INFO L482 AbstractCegarLoop]: Abstraction has 179419 states and 848712 transitions. [2021-05-21 21:24:11,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 179419 states and 848712 transitions. [2021-05-21 21:24:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:24:11,536 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:11,536 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-05-21 21:24:11,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:24:11,737 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash -233402852, now seen corresponding path program 14 times [2021-05-21 21:24:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:11,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363906212] [2021-05-21 21:24:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:24:11,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363906212] [2021-05-21 21:24:11,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363906212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383059705] [2021-05-21 21:24:11,770 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 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 [2021-05-21 21:24:11,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:24:11,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:11,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:24:11,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 21:24:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383059705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:11,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:11,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 21:24:11,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534333408] [2021-05-21 21:24:11,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:24:11,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:24:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:24:11,861 INFO L87 Difference]: Start difference. First operand 179419 states and 848712 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:16,059 INFO L93 Difference]: Finished difference Result 389060 states and 1801255 transitions. [2021-05-21 21:24:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:24:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:24:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:17,736 INFO L225 Difference]: With dead ends: 389060 [2021-05-21 21:24:17,736 INFO L226 Difference]: Without dead ends: 387773 [2021-05-21 21:24:17,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:24:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387773 states. [2021-05-21 21:24:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387773 to 285677. [2021-05-21 21:24:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285677 states, 285676 states have (on average 4.812798414987609) internal successors, (1374901), 285676 states have internal predecessors, (1374901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285677 states to 285677 states and 1374901 transitions. [2021-05-21 21:24:28,397 INFO L78 Accepts]: Start accepts. Automaton has 285677 states and 1374901 transitions. Word has length 35 [2021-05-21 21:24:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:24:28,397 INFO L482 AbstractCegarLoop]: Abstraction has 285677 states and 1374901 transitions. [2021-05-21 21:24:28,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 285677 states and 1374901 transitions. [2021-05-21 21:24:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:24:29,720 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:24:29,720 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-05-21 21:24:29,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:24:29,936 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:24:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:24:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash 828413272, now seen corresponding path program 15 times [2021-05-21 21:24:29,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:24:29,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732854042] [2021-05-21 21:24:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:24:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:24:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:24:29,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:24:29,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732854042] [2021-05-21 21:24:29,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732854042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:29,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792546912] [2021-05-21 21:24:29,977 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 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 [2021-05-21 21:24:30,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:24:30,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:24:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:24:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:24:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 21:24:30,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792546912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:24:30,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:24:30,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 21:24:30,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249720147] [2021-05-21 21:24:30,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:24:30,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:24:30,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:24:30,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:24:30,078 INFO L87 Difference]: Start difference. First operand 285677 states and 1374901 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:24:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:24:42,179 INFO L93 Difference]: Finished difference Result 1050714 states and 4955717 transitions. [2021-05-21 21:24:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 21:24:42,179 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:24:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:24:49,468 INFO L225 Difference]: With dead ends: 1050714 [2021-05-21 21:24:49,468 INFO L226 Difference]: Without dead ends: 1048522 [2021-05-21 21:24:49,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=618, Invalid=2352, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 21:24:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048522 states. [2021-05-21 21:25:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048522 to 706654. [2021-05-21 21:25:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706654 states, 706653 states have (on average 4.956557178700154) internal successors, (3502566), 706653 states have internal predecessors, (3502566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706654 states to 706654 states and 3502566 transitions. [2021-05-21 21:25:21,901 INFO L78 Accepts]: Start accepts. Automaton has 706654 states and 3502566 transitions. Word has length 35 [2021-05-21 21:25:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:25:21,901 INFO L482 AbstractCegarLoop]: Abstraction has 706654 states and 3502566 transitions. [2021-05-21 21:25:21,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 706654 states and 3502566 transitions. [2021-05-21 21:25:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:25:23,791 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:25:23,791 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-05-21 21:25:24,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 21:25:24,006 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:25:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:25:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1638836116, now seen corresponding path program 16 times [2021-05-21 21:25:24,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:25:24,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209652512] [2021-05-21 21:25:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:25:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:25:24,673 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2021-05-21 21:25:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:25:24,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:25:24,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209652512] [2021-05-21 21:25:24,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209652512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:24,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257861177] [2021-05-21 21:25:24,706 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 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 [2021-05-21 21:25:24,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:25:24,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:25:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:25:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:25:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:25:24,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257861177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:25:24,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:25:24,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 21:25:24,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044456825] [2021-05-21 21:25:24,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:25:24,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:25:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:25:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:25:24,804 INFO L87 Difference]: Start difference. First operand 706654 states and 3502566 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:25:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:25:36,680 INFO L93 Difference]: Finished difference Result 955483 states and 4512570 transitions. [2021-05-21 21:25:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 21:25:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:25:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:25:43,835 INFO L225 Difference]: With dead ends: 955483 [2021-05-21 21:25:43,835 INFO L226 Difference]: Without dead ends: 947993 [2021-05-21 21:25:43,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:25:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947993 states. [2021-05-21 21:26:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947993 to 704846. [2021-05-21 21:26:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704846 states, 704845 states have (on average 4.933249154069334) internal successors, (3477176), 704845 states have internal predecessors, (3477176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704846 states to 704846 states and 3477176 transitions. [2021-05-21 21:26:16,885 INFO L78 Accepts]: Start accepts. Automaton has 704846 states and 3477176 transitions. Word has length 35 [2021-05-21 21:26:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:26:16,885 INFO L482 AbstractCegarLoop]: Abstraction has 704846 states and 3477176 transitions. [2021-05-21 21:26:16,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:26:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 704846 states and 3477176 transitions. [2021-05-21 21:26:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:26:19,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:26:19,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-05-21 21:26:20,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 21:26:20,194 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:26:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:26:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1825465252, now seen corresponding path program 17 times [2021-05-21 21:26:20,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:26:20,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593402286] [2021-05-21 21:26:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:26:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:26:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 21:26:20,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:26:20,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593402286] [2021-05-21 21:26:20,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593402286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:20,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577292836] [2021-05-21 21:26:20,244 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 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 [2021-05-21 21:26:20,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:26:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:26:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:26:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:26:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:26:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577292836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:26:20,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:26:20,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 21:26:20,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094880462] [2021-05-21 21:26:20,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:26:20,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:26:20,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:26:20,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:26:20,372 INFO L87 Difference]: Start difference. First operand 704846 states and 3477176 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)