/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/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:10:16,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:10:16,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:10:16,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:10:16,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 18:10:16,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:10:16,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:10:16,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:10:16,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:10:16,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:10:16,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:10:16,940 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:10:16,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:10:16,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:10:16,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:10:16,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:10:16,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:10:16,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:10:16,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:10:16,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:10:16,942 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:10:16,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:10:16,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:10:16,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:10:16,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:10:16,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:10:16,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:10:16,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:10:16,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:10:16,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:10:16,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:10:16,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:10:16,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:10:16,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:10:16,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:10:16,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:10:16,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:10:17,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:10:17,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:10:17,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:10:17,252 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:10:17,253 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:10:17,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-02-19 18:10:17,254 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-02-19 18:10:17,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:10:17,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:10:17,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:10:17,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:10:17,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:10:17,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:10:17,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:10:17,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:10:17,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:10:17,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... [2021-02-19 18:10:17,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:10:17,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:10:17,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:10:17,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:10:17,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:10:17,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:10:17,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:10:17,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:10:17,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:10:17,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:10:17,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:10:17,375 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:10:17,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:10:17,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:10:17,375 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:10:17,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:10:17,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:10:17,376 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 18:10:17,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 18:10:17,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 18:10:17,376 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:10:17,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:10:17,623 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:10:17,624 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:10:17 BoogieIcfgContainer [2021-02-19 18:10:17,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:10:17,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:10:17,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:10:17,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:10:17,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:10:17" (1/2) ... [2021-02-19 18:10:17,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5042dceb and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:10:17, skipping insertion in model container [2021-02-19 18:10:17,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:10:17" (2/2) ... [2021-02-19 18:10:17,630 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-02-19 18:10:17,634 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:10:17,634 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:10:17,637 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:10:17,637 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:10:17,676 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 18:10:17,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 18:10:17,702 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:10:17,703 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:10:17,703 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:10:17,703 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:10:17,703 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:10:17,703 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:10:17,703 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:10:17,703 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:10:17,710 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-02-19 18:10:17,815 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:10:17,839 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:17,839 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:17,840 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash 182242726, now seen corresponding path program 1 times [2021-02-19 18:10:17,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:17,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422261002] [2021-02-19 18:10:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:18,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422261002] [2021-02-19 18:10:18,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:18,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:10:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955668335] [2021-02-19 18:10:18,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:10:18,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:10:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:10:18,135 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.25) 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) [2021-02-19 18:10:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:18,227 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-02-19 18:10:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:10:18,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) 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 [2021-02-19 18:10:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:18,261 INFO L225 Difference]: With dead ends: 1267 [2021-02-19 18:10:18,261 INFO L226 Difference]: Without dead ends: 1056 [2021-02-19 18:10:18,263 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:10:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-02-19 18:10:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-02-19 18:10:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-02-19 18:10:18,415 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-02-19 18:10:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:18,416 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-02-19 18:10:18,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) 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) [2021-02-19 18:10:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-02-19 18:10:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:10:18,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:18,421 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:18,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:10:18,422 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:18,425 INFO L82 PathProgramCache]: Analyzing trace with hash 106853544, now seen corresponding path program 1 times [2021-02-19 18:10:18,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:18,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426705639] [2021-02-19 18:10:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426705639] [2021-02-19 18:10:18,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:18,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:10:18,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084401673] [2021-02-19 18:10:18,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:10:18,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:10:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:10:18,487 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:18,613 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-02-19 18:10:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:10:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:10:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:18,623 INFO L225 Difference]: With dead ends: 1405 [2021-02-19 18:10:18,623 INFO L226 Difference]: Without dead ends: 1369 [2021-02-19 18:10:18,624 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:10:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-02-19 18:10:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-02-19 18:10:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-02-19 18:10:18,662 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-02-19 18:10:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:18,662 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-02-19 18:10:18,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-02-19 18:10:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:10:18,665 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:18,666 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:18,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:10:18,666 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:18,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1508131752, now seen corresponding path program 1 times [2021-02-19 18:10:18,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:18,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345509145] [2021-02-19 18:10:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:18,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345509145] [2021-02-19 18:10:18,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:18,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:10:18,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588005206] [2021-02-19 18:10:18,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:10:18,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:10:18,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:10:18,737 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:18,814 INFO L93 Difference]: Finished difference Result 1502 states and 5714 transitions. [2021-02-19 18:10:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:10:18,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:10:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:18,824 INFO L225 Difference]: With dead ends: 1502 [2021-02-19 18:10:18,825 INFO L226 Difference]: Without dead ends: 1462 [2021-02-19 18:10:18,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:10:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-02-19 18:10:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1031. [2021-02-19 18:10:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8805825242718446) internal successors, (3997), 1030 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3997 transitions. [2021-02-19 18:10:18,870 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3997 transitions. Word has length 27 [2021-02-19 18:10:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:18,875 INFO L480 AbstractCegarLoop]: Abstraction has 1031 states and 3997 transitions. [2021-02-19 18:10:18,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3997 transitions. [2021-02-19 18:10:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:10:18,878 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:18,878 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:18,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:10:18,878 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1958865832, now seen corresponding path program 2 times [2021-02-19 18:10:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:18,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032519590] [2021-02-19 18:10:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:18,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032519590] [2021-02-19 18:10:18,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:18,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:10:18,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476598804] [2021-02-19 18:10:18,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:10:18,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:10:18,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:10:18,943 INFO L87 Difference]: Start difference. First operand 1031 states and 3997 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:19,042 INFO L93 Difference]: Finished difference Result 1577 states and 5879 transitions. [2021-02-19 18:10:19,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:10:19,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:10:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:19,050 INFO L225 Difference]: With dead ends: 1577 [2021-02-19 18:10:19,050 INFO L226 Difference]: Without dead ends: 1565 [2021-02-19 18:10:19,050 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:10:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-02-19 18:10:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1019. [2021-02-19 18:10:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.8850687622789786) internal successors, (3955), 1018 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3955 transitions. [2021-02-19 18:10:19,094 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3955 transitions. Word has length 27 [2021-02-19 18:10:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:19,094 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3955 transitions. [2021-02-19 18:10:19,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3955 transitions. [2021-02-19 18:10:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:10:19,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:19,097 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:19,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:10:19,097 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash 598717544, now seen corresponding path program 2 times [2021-02-19 18:10:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:19,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110582873] [2021-02-19 18:10:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:19,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110582873] [2021-02-19 18:10:19,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:19,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:10:19,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518788276] [2021-02-19 18:10:19,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:10:19,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:19,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:10:19,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:10:19,141 INFO L87 Difference]: Start difference. First operand 1019 states and 3955 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:19,202 INFO L93 Difference]: Finished difference Result 1268 states and 4702 transitions. [2021-02-19 18:10:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:10:19,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:10:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:19,210 INFO L225 Difference]: With dead ends: 1268 [2021-02-19 18:10:19,210 INFO L226 Difference]: Without dead ends: 1186 [2021-02-19 18:10:19,211 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:10:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-02-19 18:10:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 897. [2021-02-19 18:10:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-02-19 18:10:19,241 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-02-19 18:10:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:19,241 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-02-19 18:10:19,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-02-19 18:10:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:10:19,244 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:19,244 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:19,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:10:19,244 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash -664692756, now seen corresponding path program 3 times [2021-02-19 18:10:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:19,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302718673] [2021-02-19 18:10:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:19,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302718673] [2021-02-19 18:10:19,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:19,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:10:19,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448237409] [2021-02-19 18:10:19,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:10:19,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:10:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:10:19,282 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:19,366 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-02-19 18:10:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:10:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:10:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:19,377 INFO L225 Difference]: With dead ends: 1772 [2021-02-19 18:10:19,377 INFO L226 Difference]: Without dead ends: 1752 [2021-02-19 18:10:19,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:10:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-02-19 18:10:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-02-19 18:10:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-02-19 18:10:19,416 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-02-19 18:10:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:19,417 INFO L480 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-02-19 18:10:19,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-02-19 18:10:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:10:19,420 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:19,420 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:19,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:10:19,420 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2051661804, now seen corresponding path program 4 times [2021-02-19 18:10:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:19,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837007672] [2021-02-19 18:10:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:19,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837007672] [2021-02-19 18:10:19,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:19,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:10:19,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338884671] [2021-02-19 18:10:19,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:10:19,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:19,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:10:19,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:10:19,472 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:19,540 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-02-19 18:10:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:10:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:10:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:19,548 INFO L225 Difference]: With dead ends: 1137 [2021-02-19 18:10:19,548 INFO L226 Difference]: Without dead ends: 1137 [2021-02-19 18:10:19,548 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:10:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-02-19 18:10:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-02-19 18:10:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-02-19 18:10:19,603 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-02-19 18:10:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:19,603 INFO L480 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-02-19 18:10:19,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-02-19 18:10:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:10:19,607 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:19,608 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:19,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:10:19,608 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:19,608 INFO L82 PathProgramCache]: Analyzing trace with hash -372232666, now seen corresponding path program 1 times [2021-02-19 18:10:19,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:19,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218730623] [2021-02-19 18:10:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218730623] [2021-02-19 18:10:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384390907] [2021-02-19 18:10:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:10:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:19,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:19,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 18:10:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077677139] [2021-02-19 18:10:19,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:10:19,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:10:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:10:19,962 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) 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) [2021-02-19 18:10:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:20,077 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-02-19 18:10:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:10:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) 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 [2021-02-19 18:10:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:20,087 INFO L225 Difference]: With dead ends: 1388 [2021-02-19 18:10:20,087 INFO L226 Difference]: Without dead ends: 1388 [2021-02-19 18:10:20,087 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:10:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-02-19 18:10:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-02-19 18:10:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-02-19 18:10:20,124 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-02-19 18:10:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:20,124 INFO L480 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-02-19 18:10:20,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) 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) [2021-02-19 18:10:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-02-19 18:10:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:10:20,127 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:20,127 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:20,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-02-19 18:10:20,350 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1272399782, now seen corresponding path program 2 times [2021-02-19 18:10:20,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:20,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31308772] [2021-02-19 18:10:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:20,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31308772] [2021-02-19 18:10:20,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:20,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:10:20,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725179590] [2021-02-19 18:10:20,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:10:20,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:20,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:10:20,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:10:20,378 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:20,429 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-02-19 18:10:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:10:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:10:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:20,437 INFO L225 Difference]: With dead ends: 1113 [2021-02-19 18:10:20,437 INFO L226 Difference]: Without dead ends: 1113 [2021-02-19 18:10:20,437 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:10:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-02-19 18:10:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-02-19 18:10:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-02-19 18:10:20,468 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-02-19 18:10:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:20,468 INFO L480 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-02-19 18:10:20,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-02-19 18:10:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:10:20,471 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:20,471 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:20,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:10:20,471 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:20,472 INFO L82 PathProgramCache]: Analyzing trace with hash -693205664, now seen corresponding path program 1 times [2021-02-19 18:10:20,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:20,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281207414] [2021-02-19 18:10:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:20,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281207414] [2021-02-19 18:10:20,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993102974] [2021-02-19 18:10:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:10:20,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:20,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:20,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:10:20,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045337305] [2021-02-19 18:10:20,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:10:20,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:20,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:10:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:10:20,611 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-02-19 18:10:20,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:20,684 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-02-19 18:10:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:10:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 [2021-02-19 18:10:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:20,706 INFO L225 Difference]: With dead ends: 1404 [2021-02-19 18:10:20,707 INFO L226 Difference]: Without dead ends: 1404 [2021-02-19 18:10:20,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:10:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-02-19 18:10:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-02-19 18:10:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-02-19 18:10:20,741 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-02-19 18:10:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:20,743 INFO L480 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-02-19 18:10:20,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-02-19 18:10:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-02-19 18:10:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:10:20,745 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:20,745 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:20,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 18:10:20,946 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1031773016, now seen corresponding path program 2 times [2021-02-19 18:10:20,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:20,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272704115] [2021-02-19 18:10:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:20,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272704115] [2021-02-19 18:10:20,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161060882] [2021-02-19 18:10:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:21,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:10:21,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:10:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:21,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 18:10:21,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-02-19 18:10:21,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464916698] [2021-02-19 18:10:21,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:10:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:10:21,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:10:21,149 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:21,185 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-02-19 18:10:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:10:21,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:10:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:21,189 INFO L225 Difference]: With dead ends: 1123 [2021-02-19 18:10:21,189 INFO L226 Difference]: Without dead ends: 1063 [2021-02-19 18:10:21,189 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:10:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-02-19 18:10:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-02-19 18:10:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-02-19 18:10:21,216 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-02-19 18:10:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:21,217 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-02-19 18:10:21,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-02-19 18:10:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:10:21,219 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:21,219 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:21,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 18:10:21,443 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1356768614, now seen corresponding path program 1 times [2021-02-19 18:10:21,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:21,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861874402] [2021-02-19 18:10:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:21,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861874402] [2021-02-19 18:10:21,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895122460] [2021-02-19 18:10:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:10:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:21,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:21,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:10:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240662768] [2021-02-19 18:10:21,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:10:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:21,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:10:21,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:10:21,683 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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) [2021-02-19 18:10:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:21,763 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-02-19 18:10:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:10:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 33 [2021-02-19 18:10:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:21,774 INFO L225 Difference]: With dead ends: 3683 [2021-02-19 18:10:21,775 INFO L226 Difference]: Without dead ends: 3245 [2021-02-19 18:10:21,775 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:10:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-02-19 18:10:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-02-19 18:10:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-02-19 18:10:21,841 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-02-19 18:10:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:21,841 INFO L480 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-02-19 18:10:21,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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) [2021-02-19 18:10:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-02-19 18:10:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:10:21,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:21,847 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:22,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:22,063 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1183417198, now seen corresponding path program 2 times [2021-02-19 18:10:22,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:22,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756336555] [2021-02-19 18:10:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:22,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756336555] [2021-02-19 18:10:22,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682598042] [2021-02-19 18:10:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:22,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:10:22,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:10:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:22,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:22,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-02-19 18:10:22,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821071169] [2021-02-19 18:10:22,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:10:22,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:22,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:10:22,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:10:22,299 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2021-02-19 18:10:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:22,435 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-02-19 18:10:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:10:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 33 [2021-02-19 18:10:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:22,474 INFO L225 Difference]: With dead ends: 5705 [2021-02-19 18:10:22,475 INFO L226 Difference]: Without dead ends: 5282 [2021-02-19 18:10:22,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:10:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-02-19 18:10:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-02-19 18:10:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-02-19 18:10:22,577 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-02-19 18:10:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:22,577 INFO L480 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-02-19 18:10:22,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2021-02-19 18:10:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-02-19 18:10:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:10:22,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:22,586 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:22,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 18:10:22,802 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash 576104674, now seen corresponding path program 3 times [2021-02-19 18:10:22,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:22,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589302152] [2021-02-19 18:10:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:22,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589302152] [2021-02-19 18:10:22,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390134279] [2021-02-19 18:10:22,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:22,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:10:22,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:10:22,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:23,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:23,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-02-19 18:10:23,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497290801] [2021-02-19 18:10:23,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:10:23,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:10:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:10:23,012 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2021-02-19 18:10:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:23,108 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-02-19 18:10:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 18:10:23,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 33 [2021-02-19 18:10:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:23,126 INFO L225 Difference]: With dead ends: 5724 [2021-02-19 18:10:23,126 INFO L226 Difference]: Without dead ends: 5132 [2021-02-19 18:10:23,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:10:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-02-19 18:10:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-02-19 18:10:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-02-19 18:10:23,208 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-02-19 18:10:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:23,208 INFO L480 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-02-19 18:10:23,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2021-02-19 18:10:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-02-19 18:10:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:10:23,214 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:23,214 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:23,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:23,430 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:23,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1842394792, now seen corresponding path program 4 times [2021-02-19 18:10:23,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:23,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991738391] [2021-02-19 18:10:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991738391] [2021-02-19 18:10:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550875286] [2021-02-19 18:10:23,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:23,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:10:23,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:23,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:10:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:23,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:23,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 18:10:23,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015867932] [2021-02-19 18:10:23,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:10:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:23,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:10:23,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:10:23,649 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-02-19 18:10:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:24,021 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-02-19 18:10:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:10:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 35 [2021-02-19 18:10:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:24,041 INFO L225 Difference]: With dead ends: 6143 [2021-02-19 18:10:24,042 INFO L226 Difference]: Without dead ends: 6077 [2021-02-19 18:10:24,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:10:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-02-19 18:10:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-02-19 18:10:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-02-19 18:10:24,140 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-02-19 18:10:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:24,141 INFO L480 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-02-19 18:10:24,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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) [2021-02-19 18:10:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-02-19 18:10:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:10:24,149 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:24,149 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:24,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:10:24,371 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash -13016164, now seen corresponding path program 5 times [2021-02-19 18:10:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:24,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876371947] [2021-02-19 18:10:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:24,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876371947] [2021-02-19 18:10:24,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769154174] [2021-02-19 18:10:24,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:24,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:10:24,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:24,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:10:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:24,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:24,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-02-19 18:10:24,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34347810] [2021-02-19 18:10:24,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:10:24,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:24,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:10:24,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:10:24,574 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:24,903 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-02-19 18:10:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:10:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:10:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:24,938 INFO L225 Difference]: With dead ends: 10702 [2021-02-19 18:10:24,938 INFO L226 Difference]: Without dead ends: 10294 [2021-02-19 18:10:24,938 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:10:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-02-19 18:10:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-02-19 18:10:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-02-19 18:10:25,087 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-02-19 18:10:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:25,087 INFO L480 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-02-19 18:10:25,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-02-19 18:10:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:10:25,101 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:25,101 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:25,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 18:10:25,323 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:25,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1893043296, now seen corresponding path program 6 times [2021-02-19 18:10:25,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:25,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460710738] [2021-02-19 18:10:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:25,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460710738] [2021-02-19 18:10:25,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267366558] [2021-02-19 18:10:25,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:25,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:10:25,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:10:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:25,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:25,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-02-19 18:10:25,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82220051] [2021-02-19 18:10:25,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:10:25,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:25,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:10:25,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:10:25,550 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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) [2021-02-19 18:10:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:26,098 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-02-19 18:10:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:10:26,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 [2021-02-19 18:10:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:26,129 INFO L225 Difference]: With dead ends: 7423 [2021-02-19 18:10:26,129 INFO L226 Difference]: Without dead ends: 7391 [2021-02-19 18:10:26,132 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:10:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-02-19 18:10:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-02-19 18:10:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-02-19 18:10:26,286 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-02-19 18:10:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:26,286 INFO L480 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-02-19 18:10:26,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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) [2021-02-19 18:10:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-02-19 18:10:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:10:26,298 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:26,299 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:26,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:10:26,514 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1315670560, now seen corresponding path program 7 times [2021-02-19 18:10:26,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:26,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200460338] [2021-02-19 18:10:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:26,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200460338] [2021-02-19 18:10:26,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21702310] [2021-02-19 18:10:26,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:26,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:10:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:26,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:26,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-02-19 18:10:26,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245699512] [2021-02-19 18:10:26,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:10:26,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:10:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:10:26,741 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:27,278 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-02-19 18:10:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:10:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:10:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:27,332 INFO L225 Difference]: With dead ends: 17746 [2021-02-19 18:10:27,333 INFO L226 Difference]: Without dead ends: 17648 [2021-02-19 18:10:27,333 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:10:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-02-19 18:10:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-02-19 18:10:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-02-19 18:10:27,588 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-02-19 18:10:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:27,588 INFO L480 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-02-19 18:10:27,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-02-19 18:10:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:10:27,617 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:27,617 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:27,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:10:27,830 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:27,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1434769572, now seen corresponding path program 8 times [2021-02-19 18:10:27,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:27,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130336290] [2021-02-19 18:10:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:27,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130336290] [2021-02-19 18:10:27,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060502248] [2021-02-19 18:10:27,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:27,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:10:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:10:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:28,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:28,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-02-19 18:10:28,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045607488] [2021-02-19 18:10:28,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:10:28,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:10:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:10:28,046 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:28,512 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-02-19 18:10:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:10:28,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:10:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:28,562 INFO L225 Difference]: With dead ends: 21973 [2021-02-19 18:10:28,563 INFO L226 Difference]: Without dead ends: 21443 [2021-02-19 18:10:28,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:10:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-02-19 18:10:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-02-19 18:10:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-02-19 18:10:28,943 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-02-19 18:10:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:28,943 INFO L480 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-02-19 18:10:28,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-02-19 18:10:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:10:28,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:28,982 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:29,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:29,198 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:29,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1044807844, now seen corresponding path program 9 times [2021-02-19 18:10:29,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:29,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106395086] [2021-02-19 18:10:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:29,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106395086] [2021-02-19 18:10:29,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651096230] [2021-02-19 18:10:29,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:29,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:10:29,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:29,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:10:29,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:29,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:29,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-02-19 18:10:29,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427858799] [2021-02-19 18:10:29,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:10:29,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:10:29,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:10:29,503 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:30,137 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-02-19 18:10:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:10:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:10:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:30,178 INFO L225 Difference]: With dead ends: 15939 [2021-02-19 18:10:30,178 INFO L226 Difference]: Without dead ends: 15563 [2021-02-19 18:10:30,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:10:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-02-19 18:10:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-02-19 18:10:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-02-19 18:10:30,579 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-02-19 18:10:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:30,579 INFO L480 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-02-19 18:10:30,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-02-19 18:10:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:10:30,608 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:30,609 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:30,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:30,809 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash -247390440, now seen corresponding path program 10 times [2021-02-19 18:10:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:30,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842778761] [2021-02-19 18:10:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:30,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842778761] [2021-02-19 18:10:30,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001582718] [2021-02-19 18:10:30,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:30,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:10:30,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:10:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:31,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:31,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-02-19 18:10:31,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503397967] [2021-02-19 18:10:31,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:10:31,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:31,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:10:31,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:10:31,044 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:31,282 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-02-19 18:10:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:10:31,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:10:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:31,387 INFO L225 Difference]: With dead ends: 17650 [2021-02-19 18:10:31,387 INFO L226 Difference]: Without dead ends: 17578 [2021-02-19 18:10:31,389 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:10:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-02-19 18:10:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-02-19 18:10:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-02-19 18:10:31,778 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-02-19 18:10:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:31,778 INFO L480 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-02-19 18:10:31,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-02-19 18:10:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:10:31,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:31,806 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:32,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 18:10:32,026 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:32,026 INFO L82 PathProgramCache]: Analyzing trace with hash 701962798, now seen corresponding path program 11 times [2021-02-19 18:10:32,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:32,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734162953] [2021-02-19 18:10:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:10:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734162953] [2021-02-19 18:10:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192327152] [2021-02-19 18:10:32,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:32,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:10:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:10:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:32,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:32,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 18:10:32,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927161564] [2021-02-19 18:10:32,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:10:32,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:32,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:10:32,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:10:32,294 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:33,020 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-02-19 18:10:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:10:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:10:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:33,173 INFO L225 Difference]: With dead ends: 47667 [2021-02-19 18:10:33,173 INFO L226 Difference]: Without dead ends: 46072 [2021-02-19 18:10:33,173 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:10:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-02-19 18:10:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-02-19 18:10:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-02-19 18:10:34,206 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-02-19 18:10:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:34,206 INFO L480 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-02-19 18:10:34,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-02-19 18:10:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:10:34,272 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:34,272 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:34,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:34,473 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash 55102898, now seen corresponding path program 12 times [2021-02-19 18:10:34,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:34,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836683970] [2021-02-19 18:10:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:10:34,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836683970] [2021-02-19 18:10:34,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58417576] [2021-02-19 18:10:34,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:34,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 18:10:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:10:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:34,845 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-02-19 18:10:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:34,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:34,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-02-19 18:10:34,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836253923] [2021-02-19 18:10:34,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:10:34,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:34,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:10:34,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:10:34,959 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:35,466 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-02-19 18:10:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:10:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:10:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:35,794 INFO L225 Difference]: With dead ends: 41877 [2021-02-19 18:10:35,794 INFO L226 Difference]: Without dead ends: 41385 [2021-02-19 18:10:35,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:10:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-02-19 18:10:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-02-19 18:10:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-02-19 18:10:36,501 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-02-19 18:10:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:36,501 INFO L480 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-02-19 18:10:36,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-02-19 18:10:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:10:36,565 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:36,565 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:36,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:10:36,766 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1592746274, now seen corresponding path program 13 times [2021-02-19 18:10:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:36,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824774253] [2021-02-19 18:10:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:10:36,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824774253] [2021-02-19 18:10:36,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713866219] [2021-02-19 18:10:36,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:10:36,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:36,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:36,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-02-19 18:10:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895313279] [2021-02-19 18:10:36,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:10:36,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:10:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:10:36,956 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:37,152 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2021-02-19 18:10:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:37,831 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-02-19 18:10:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:10:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:10:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:38,017 INFO L225 Difference]: With dead ends: 55329 [2021-02-19 18:10:38,017 INFO L226 Difference]: Without dead ends: 54965 [2021-02-19 18:10:38,017 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:10:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-02-19 18:10:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-02-19 18:10:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-02-19 18:10:39,397 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-02-19 18:10:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:39,397 INFO L480 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-02-19 18:10:39,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-02-19 18:10:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:10:39,472 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:39,472 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:10:39,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:39,672 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1687135330, now seen corresponding path program 14 times [2021-02-19 18:10:39,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:39,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002910730] [2021-02-19 18:10:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:10:39,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002910730] [2021-02-19 18:10:39,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:10:39,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:10:39,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923311186] [2021-02-19 18:10:39,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:10:39,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:39,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:10:39,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:10:39,692 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:39,895 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-02-19 18:10:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:10:39,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:10:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:40,384 INFO L225 Difference]: With dead ends: 36224 [2021-02-19 18:10:40,398 INFO L226 Difference]: Without dead ends: 36156 [2021-02-19 18:10:40,398 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:10:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-02-19 18:10:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-02-19 18:10:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-02-19 18:10:41,375 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-02-19 18:10:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:41,375 INFO L480 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-02-19 18:10:41,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-02-19 18:10:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:10:41,455 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:41,455 INFO L506 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, 1, 1, 1, 1] [2021-02-19 18:10:41,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-19 18:10:41,455 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:41,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1518655952, now seen corresponding path program 15 times [2021-02-19 18:10:41,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:41,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666476483] [2021-02-19 18:10:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:10:41,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666476483] [2021-02-19 18:10:41,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033852431] [2021-02-19 18:10:41,477 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:41,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:10:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:10:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:10:41,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:41,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-02-19 18:10:41,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858775829] [2021-02-19 18:10:41,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:10:41,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:41,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:10:41,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:10:41,648 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:42,224 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-02-19 18:10:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:10:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:10:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:42,403 INFO L225 Difference]: With dead ends: 51586 [2021-02-19 18:10:42,403 INFO L226 Difference]: Without dead ends: 50003 [2021-02-19 18:10:42,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:10:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-02-19 18:10:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-02-19 18:10:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-02-19 18:10:44,013 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-02-19 18:10:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:44,013 INFO L480 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-02-19 18:10:44,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-02-19 18:10:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:10:44,103 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:44,103 INFO L506 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, 1, 1, 1, 1] [2021-02-19 18:10:44,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 18:10:44,306 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1323463640, now seen corresponding path program 16 times [2021-02-19 18:10:44,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:44,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561174779] [2021-02-19 18:10:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:10:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561174779] [2021-02-19 18:10:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472733097] [2021-02-19 18:10:44,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:44,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:10:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 18:10:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:10:44,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:44,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 18:10:44,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253890287] [2021-02-19 18:10:44,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 18:10:44,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 18:10:44,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:10:44,527 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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) [2021-02-19 18:10:45,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:45,562 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-02-19 18:10:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:10:45,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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 39 [2021-02-19 18:10:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:45,816 INFO L225 Difference]: With dead ends: 63166 [2021-02-19 18:10:45,816 INFO L226 Difference]: Without dead ends: 63106 [2021-02-19 18:10:45,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:10:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-02-19 18:10:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-02-19 18:10:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-02-19 18:10:47,135 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-02-19 18:10:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:47,136 INFO L480 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-02-19 18:10:47,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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) [2021-02-19 18:10:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-02-19 18:10:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:10:47,236 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:47,236 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:10:47,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:10:47,437 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -298626346, now seen corresponding path program 17 times [2021-02-19 18:10:47,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:47,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478010498] [2021-02-19 18:10:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:10:47,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478010498] [2021-02-19 18:10:47,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35067790] [2021-02-19 18:10:47,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:47,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:10:47,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 18:10:47,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:10:47,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:47,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:10:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059876372] [2021-02-19 18:10:47,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:10:47,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:47,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:10:47,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:10:47,685 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:48,067 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-02-19 18:10:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:10:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:10:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:48,670 INFO L225 Difference]: With dead ends: 49744 [2021-02-19 18:10:48,670 INFO L226 Difference]: Without dead ends: 49407 [2021-02-19 18:10:48,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:10:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-02-19 18:10:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-02-19 18:10:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-02-19 18:10:50,050 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-02-19 18:10:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:50,050 INFO L480 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-02-19 18:10:50,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-02-19 18:10:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:10:50,142 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:50,142 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:10:50,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 18:10:50,346 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1245137962, now seen corresponding path program 18 times [2021-02-19 18:10:50,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:50,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854203631] [2021-02-19 18:10:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:50,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854203631] [2021-02-19 18:10:50,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709480995] [2021-02-19 18:10:50,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:50,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:10:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:10:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:50,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:50,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 18:10:50,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080889546] [2021-02-19 18:10:50,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:10:50,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:50,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:10:50,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:10:50,621 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:51,092 INFO L93 Difference]: Finished difference Result 58655 states and 269908 transitions. [2021-02-19 18:10:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 18:10:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:10:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:51,275 INFO L225 Difference]: With dead ends: 58655 [2021-02-19 18:10:51,275 INFO L226 Difference]: Without dead ends: 57127 [2021-02-19 18:10:51,275 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:10:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57127 states. [2021-02-19 18:10:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57127 to 53264. [2021-02-19 18:10:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53264 states, 53263 states have (on average 4.692769840226799) internal successors, (249951), 53263 states have internal predecessors, (249951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53264 states to 53264 states and 249951 transitions. [2021-02-19 18:10:53,172 INFO L78 Accepts]: Start accepts. Automaton has 53264 states and 249951 transitions. Word has length 41 [2021-02-19 18:10:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:53,172 INFO L480 AbstractCegarLoop]: Abstraction has 53264 states and 249951 transitions. [2021-02-19 18:10:53,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 53264 states and 249951 transitions. [2021-02-19 18:10:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:10:53,309 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:53,309 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:10:53,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:10:53,511 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:53,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2098470058, now seen corresponding path program 19 times [2021-02-19 18:10:53,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:53,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855432421] [2021-02-19 18:10:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:53,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855432421] [2021-02-19 18:10:53,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479547749] [2021-02-19 18:10:53,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:10:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:10:53,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:53,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 18:10:53,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238408369] [2021-02-19 18:10:53,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:10:53,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:10:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:10:53,822 INFO L87 Difference]: Start difference. First operand 53264 states and 249951 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:54,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:54,377 INFO L93 Difference]: Finished difference Result 69570 states and 319062 transitions. [2021-02-19 18:10:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:10:54,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:10:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:55,150 INFO L225 Difference]: With dead ends: 69570 [2021-02-19 18:10:55,151 INFO L226 Difference]: Without dead ends: 68988 [2021-02-19 18:10:55,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:10:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68988 states. [2021-02-19 18:10:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68988 to 60090. [2021-02-19 18:10:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60090 states, 60089 states have (on average 4.68270398908286) internal successors, (281379), 60089 states have internal predecessors, (281379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60090 states to 60090 states and 281379 transitions. [2021-02-19 18:10:56,775 INFO L78 Accepts]: Start accepts. Automaton has 60090 states and 281379 transitions. Word has length 41 [2021-02-19 18:10:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:10:56,775 INFO L480 AbstractCegarLoop]: Abstraction has 60090 states and 281379 transitions. [2021-02-19 18:10:56,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 60090 states and 281379 transitions. [2021-02-19 18:10:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:10:56,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:10:56,905 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:10:57,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:57,106 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:10:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:10:57,106 INFO L82 PathProgramCache]: Analyzing trace with hash -49057894, now seen corresponding path program 20 times [2021-02-19 18:10:57,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:10:57,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999911389] [2021-02-19 18:10:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:10:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:10:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999911389] [2021-02-19 18:10:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835871603] [2021-02-19 18:10:57,189 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:10:57,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:10:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:10:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:10:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:10:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:10:57,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:10:57,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:10:57,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495171394] [2021-02-19 18:10:57,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:10:57,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:10:57,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:10:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:10:57,378 INFO L87 Difference]: Start difference. First operand 60090 states and 281379 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:10:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:10:58,729 INFO L93 Difference]: Finished difference Result 99616 states and 455206 transitions. [2021-02-19 18:10:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:10:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:10:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:10:59,060 INFO L225 Difference]: With dead ends: 99616 [2021-02-19 18:10:59,060 INFO L226 Difference]: Without dead ends: 97205 [2021-02-19 18:10:59,060 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:10:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97205 states. [2021-02-19 18:11:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97205 to 79679. [2021-02-19 18:11:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79679 states, 79678 states have (on average 4.6890484198900575) internal successors, (373614), 79678 states have internal predecessors, (373614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79679 states to 79679 states and 373614 transitions. [2021-02-19 18:11:01,994 INFO L78 Accepts]: Start accepts. Automaton has 79679 states and 373614 transitions. Word has length 41 [2021-02-19 18:11:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:01,994 INFO L480 AbstractCegarLoop]: Abstraction has 79679 states and 373614 transitions. [2021-02-19 18:11:01,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 79679 states and 373614 transitions. [2021-02-19 18:11:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:02,167 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:02,167 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:02,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:02,369 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash -625538262, now seen corresponding path program 21 times [2021-02-19 18:11:02,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:02,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043726614] [2021-02-19 18:11:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:02,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043726614] [2021-02-19 18:11:02,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549194775] [2021-02-19 18:11:02,435 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:02,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:11:02,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:02,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:11:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:02,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:02,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-02-19 18:11:02,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368575987] [2021-02-19 18:11:02,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:02,628 INFO L87 Difference]: Start difference. First operand 79679 states and 373614 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:04,127 INFO L93 Difference]: Finished difference Result 137546 states and 634094 transitions. [2021-02-19 18:11:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:11:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:04,605 INFO L225 Difference]: With dead ends: 137546 [2021-02-19 18:11:04,606 INFO L226 Difference]: Without dead ends: 134856 [2021-02-19 18:11:04,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134856 states. [2021-02-19 18:11:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134856 to 109869. [2021-02-19 18:11:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109869 states, 109868 states have (on average 4.7487075399570395) internal successors, (521731), 109868 states have internal predecessors, (521731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109869 states to 109869 states and 521731 transitions. [2021-02-19 18:11:08,730 INFO L78 Accepts]: Start accepts. Automaton has 109869 states and 521731 transitions. Word has length 41 [2021-02-19 18:11:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:08,730 INFO L480 AbstractCegarLoop]: Abstraction has 109869 states and 521731 transitions. [2021-02-19 18:11:08,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 109869 states and 521731 transitions. [2021-02-19 18:11:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:08,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:08,987 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:09,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-02-19 18:11:09,188 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1232850786, now seen corresponding path program 22 times [2021-02-19 18:11:09,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:09,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924377985] [2021-02-19 18:11:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:09,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924377985] [2021-02-19 18:11:09,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461394877] [2021-02-19 18:11:09,255 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:09,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:11:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:11:09,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:09,972 WARN L202 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-02-19 18:11:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:10,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:10,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:11:10,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96957391] [2021-02-19 18:11:10,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:10,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:10,183 INFO L87 Difference]: Start difference. First operand 109869 states and 521731 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:11,092 INFO L93 Difference]: Finished difference Result 145531 states and 671224 transitions. [2021-02-19 18:11:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:11:11,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:12,263 INFO L225 Difference]: With dead ends: 145531 [2021-02-19 18:11:12,264 INFO L226 Difference]: Without dead ends: 145239 [2021-02-19 18:11:12,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:11:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145239 states. [2021-02-19 18:11:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145239 to 109527. [2021-02-19 18:11:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109527 states, 109526 states have (on average 4.735423552398517) internal successors, (518652), 109526 states have internal predecessors, (518652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109527 states to 109527 states and 518652 transitions. [2021-02-19 18:11:15,795 INFO L78 Accepts]: Start accepts. Automaton has 109527 states and 518652 transitions. Word has length 41 [2021-02-19 18:11:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:15,796 INFO L480 AbstractCegarLoop]: Abstraction has 109527 states and 518652 transitions. [2021-02-19 18:11:15,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 109527 states and 518652 transitions. [2021-02-19 18:11:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:16,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:16,935 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:17,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:17,138 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:17,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1541401630, now seen corresponding path program 23 times [2021-02-19 18:11:17,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:17,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495218103] [2021-02-19 18:11:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:17,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495218103] [2021-02-19 18:11:17,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354617685] [2021-02-19 18:11:17,220 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:17,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:11:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 18:11:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:17,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:17,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:17,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830957819] [2021-02-19 18:11:17,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:11:17,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:11:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:11:17,438 INFO L87 Difference]: Start difference. First operand 109527 states and 518652 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:19,354 INFO L93 Difference]: Finished difference Result 168281 states and 787108 transitions. [2021-02-19 18:11:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:11:19,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:20,003 INFO L225 Difference]: With dead ends: 168281 [2021-02-19 18:11:20,003 INFO L226 Difference]: Without dead ends: 165068 [2021-02-19 18:11:20,003 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:11:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165068 states. [2021-02-19 18:11:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165068 to 96217. [2021-02-19 18:11:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-02-19 18:11:24,140 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-02-19 18:11:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:24,141 INFO L480 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-02-19 18:11:24,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-02-19 18:11:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:24,373 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:24,373 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:24,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 18:11:24,574 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:24,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1553982038, now seen corresponding path program 24 times [2021-02-19 18:11:24,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:24,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11034093] [2021-02-19 18:11:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:24,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11034093] [2021-02-19 18:11:24,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164704534] [2021-02-19 18:11:24,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:24,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:11:24,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:11:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:24,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:24,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-02-19 18:11:24,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814146836] [2021-02-19 18:11:24,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:11:24,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:24,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:11:24,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:11:24,844 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:26,297 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-02-19 18:11:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:11:26,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:26,757 INFO L225 Difference]: With dead ends: 118313 [2021-02-19 18:11:26,757 INFO L226 Difference]: Without dead ends: 118079 [2021-02-19 18:11:26,758 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-02-19 18:11:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-02-19 18:11:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-02-19 18:11:29,910 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-02-19 18:11:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:29,910 INFO L480 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-02-19 18:11:29,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-02-19 18:11:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:30,160 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:30,160 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:30,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:11:30,362 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:30,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:30,362 INFO L82 PathProgramCache]: Analyzing trace with hash -200799446, now seen corresponding path program 25 times [2021-02-19 18:11:30,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:30,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947683271] [2021-02-19 18:11:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:30,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947683271] [2021-02-19 18:11:30,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043305515] [2021-02-19 18:11:30,423 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:11:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:30,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:30,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-02-19 18:11:30,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737303933] [2021-02-19 18:11:30,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:30,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:30,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:30,594 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:32,252 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-02-19 18:11:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:11:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:32,720 INFO L225 Difference]: With dead ends: 131320 [2021-02-19 18:11:32,720 INFO L226 Difference]: Without dead ends: 130644 [2021-02-19 18:11:32,720 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:11:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-02-19 18:11:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-02-19 18:11:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-02-19 18:11:37,049 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-02-19 18:11:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:37,050 INFO L480 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-02-19 18:11:37,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:37,050 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-02-19 18:11:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:37,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:37,406 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:37,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:11:37,622 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:37,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:37,622 INFO L82 PathProgramCache]: Analyzing trace with hash -808111970, now seen corresponding path program 26 times [2021-02-19 18:11:37,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:37,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363492862] [2021-02-19 18:11:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:37,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363492862] [2021-02-19 18:11:37,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696208073] [2021-02-19 18:11:37,742 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:37,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:11:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:37,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:11:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:37,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:37,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:11:37,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276729536] [2021-02-19 18:11:37,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:37,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:37,991 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:40,194 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-02-19 18:11:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:11:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:40,689 INFO L225 Difference]: With dead ends: 140482 [2021-02-19 18:11:40,689 INFO L226 Difference]: Without dead ends: 139756 [2021-02-19 18:11:40,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-02-19 18:11:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-02-19 18:11:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-02-19 18:11:44,806 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-02-19 18:11:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:44,806 INFO L480 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-02-19 18:11:44,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-02-19 18:11:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:45,069 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:45,069 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:45,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:11:45,270 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:45,270 INFO L82 PathProgramCache]: Analyzing trace with hash -682938726, now seen corresponding path program 27 times [2021-02-19 18:11:45,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:45,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351996879] [2021-02-19 18:11:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:45,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351996879] [2021-02-19 18:11:45,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709277546] [2021-02-19 18:11:45,353 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:45,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:11:45,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:45,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:11:45,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:45,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:45,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 18:11:45,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4026990] [2021-02-19 18:11:45,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:45,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:45,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:45,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:45,567 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:47,270 INFO L93 Difference]: Finished difference Result 184975 states and 856180 transitions. [2021-02-19 18:11:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:11:47,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:48,442 INFO L225 Difference]: With dead ends: 184975 [2021-02-19 18:11:48,442 INFO L226 Difference]: Without dead ends: 182892 [2021-02-19 18:11:48,442 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182892 states. [2021-02-19 18:11:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182892 to 160009. [2021-02-19 18:11:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160009 states, 160008 states have (on average 4.737906854657267) internal successors, (758103), 160008 states have internal predecessors, (758103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160009 states to 160009 states and 758103 transitions. [2021-02-19 18:11:53,892 INFO L78 Accepts]: Start accepts. Automaton has 160009 states and 758103 transitions. Word has length 41 [2021-02-19 18:11:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:53,892 INFO L480 AbstractCegarLoop]: Abstraction has 160009 states and 758103 transitions. [2021-02-19 18:11:53,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 160009 states and 758103 transitions. [2021-02-19 18:11:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:11:55,077 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:55,077 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:11:55,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 18:11:55,290 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:55,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1259419094, now seen corresponding path program 28 times [2021-02-19 18:11:55,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:55,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685769288] [2021-02-19 18:11:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:55,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685769288] [2021-02-19 18:11:55,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991956814] [2021-02-19 18:11:55,365 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:55,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:11:55,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:55,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:11:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:55,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:55,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:11:55,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881306987] [2021-02-19 18:11:55,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:55,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:55,564 INFO L87 Difference]: Start difference. First operand 160009 states and 758103 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:57,885 INFO L93 Difference]: Finished difference Result 275154 states and 1285905 transitions. [2021-02-19 18:11:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:11:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:11:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:59,688 INFO L225 Difference]: With dead ends: 275154 [2021-02-19 18:11:59,688 INFO L226 Difference]: Without dead ends: 272682 [2021-02-19 18:11:59,689 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:11:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272682 states. [2021-02-19 18:12:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272682 to 197517. [2021-02-19 18:12:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197517 states, 197516 states have (on average 4.791348548978311) internal successors, (946368), 197516 states have internal predecessors, (946368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197517 states to 197517 states and 946368 transitions. [2021-02-19 18:12:08,012 INFO L78 Accepts]: Start accepts. Automaton has 197517 states and 946368 transitions. Word has length 41 [2021-02-19 18:12:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:12:08,012 INFO L480 AbstractCegarLoop]: Abstraction has 197517 states and 946368 transitions. [2021-02-19 18:12:08,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 197517 states and 946368 transitions. [2021-02-19 18:12:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:12:08,537 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:12:08,537 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:12:08,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:12:08,737 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:12:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:12:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1866731618, now seen corresponding path program 29 times [2021-02-19 18:12:08,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:12:08,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121782733] [2021-02-19 18:12:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:12:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:12:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:12:08,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121782733] [2021-02-19 18:12:08,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305193777] [2021-02-19 18:12:08,813 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:12:08,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:12:08,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:12:08,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 18:12:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:12:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:12:09,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:12:09,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:12:09,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382040572] [2021-02-19 18:12:09,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:12:09,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:12:09,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:12:09,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:12:09,021 INFO L87 Difference]: Start difference. First operand 197517 states and 946368 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:12:12,295 INFO L93 Difference]: Finished difference Result 288467 states and 1353676 transitions. [2021-02-19 18:12:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:12:12,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:12:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:12:13,643 INFO L225 Difference]: With dead ends: 288467 [2021-02-19 18:12:13,643 INFO L226 Difference]: Without dead ends: 287967 [2021-02-19 18:12:13,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:12:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287967 states. [2021-02-19 18:12:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287967 to 203660. [2021-02-19 18:12:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203660 states, 203659 states have (on average 4.804614576326114) internal successors, (978503), 203659 states have internal predecessors, (978503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203660 states to 203660 states and 978503 transitions. [2021-02-19 18:12:22,255 INFO L78 Accepts]: Start accepts. Automaton has 203660 states and 978503 transitions. Word has length 41 [2021-02-19 18:12:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:12:22,255 INFO L480 AbstractCegarLoop]: Abstraction has 203660 states and 978503 transitions. [2021-02-19 18:12:22,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 203660 states and 978503 transitions. [2021-02-19 18:12:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:12:23,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:12:23,671 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:12:23,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:12:23,878 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:12:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:12:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2119684834, now seen corresponding path program 30 times [2021-02-19 18:12:23,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:12:23,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283379153] [2021-02-19 18:12:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:12:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:12:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:12:23,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283379153] [2021-02-19 18:12:23,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456695259] [2021-02-19 18:12:23,959 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:12:23,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:12:23,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:12:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:12:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:12:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:12:24,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:12:24,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 18:12:24,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555230452] [2021-02-19 18:12:24,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:12:24,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:12:24,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:12:24,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:12:24,141 INFO L87 Difference]: Start difference. First operand 203660 states and 978503 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:12:26,649 INFO L93 Difference]: Finished difference Result 267133 states and 1271421 transitions. [2021-02-19 18:12:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:12:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:12:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:12:29,390 INFO L225 Difference]: With dead ends: 267133 [2021-02-19 18:12:29,391 INFO L226 Difference]: Without dead ends: 264039 [2021-02-19 18:12:29,391 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:12:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264039 states. [2021-02-19 18:12:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264039 to 116427. [2021-02-19 18:12:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-02-19 18:12:35,938 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-02-19 18:12:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:12:35,938 INFO L480 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-02-19 18:12:35,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-02-19 18:12:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:12:36,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:12:36,210 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:12:36,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 18:12:36,411 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:12:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:12:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash 49869166, now seen corresponding path program 31 times [2021-02-19 18:12:36,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:12:36,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637757115] [2021-02-19 18:12:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:12:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:12:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:12:36,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637757115] [2021-02-19 18:12:36,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320477433] [2021-02-19 18:12:36,487 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:12:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:12:36,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:12:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:12:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:12:36,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:12:36,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-02-19 18:12:36,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823850718] [2021-02-19 18:12:36,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:12:36,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:12:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:12:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:12:36,703 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:12:38,579 INFO L93 Difference]: Finished difference Result 201247 states and 938010 transitions. [2021-02-19 18:12:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:12:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:12:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:12:39,983 INFO L225 Difference]: With dead ends: 201247 [2021-02-19 18:12:39,983 INFO L226 Difference]: Without dead ends: 199504 [2021-02-19 18:12:39,984 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:12:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199504 states. [2021-02-19 18:12:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199504 to 144560. [2021-02-19 18:12:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144560 states, 144559 states have (on average 4.791019583699389) internal successors, (692585), 144559 states have internal predecessors, (692585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144560 states to 144560 states and 692585 transitions. [2021-02-19 18:12:45,557 INFO L78 Accepts]: Start accepts. Automaton has 144560 states and 692585 transitions. Word has length 41 [2021-02-19 18:12:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:12:45,557 INFO L480 AbstractCegarLoop]: Abstraction has 144560 states and 692585 transitions. [2021-02-19 18:12:45,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 144560 states and 692585 transitions. [2021-02-19 18:12:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:12:45,908 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:12:45,908 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:12:46,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:12:46,109 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:12:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:12:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash -178016610, now seen corresponding path program 32 times [2021-02-19 18:12:46,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:12:46,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607618410] [2021-02-19 18:12:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:12:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:12:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:12:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607618410] [2021-02-19 18:12:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470325862] [2021-02-19 18:12:46,993 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:12:47,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:12:47,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:12:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:12:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:12:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:12:47,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:12:47,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-02-19 18:12:47,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696495966] [2021-02-19 18:12:47,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:12:47,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:12:47,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:12:47,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:12:47,284 INFO L87 Difference]: Start difference. First operand 144560 states and 692585 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:12:49,542 INFO L93 Difference]: Finished difference Result 274872 states and 1287895 transitions. [2021-02-19 18:12:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:12:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:12:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:12:51,279 INFO L225 Difference]: With dead ends: 274872 [2021-02-19 18:12:51,279 INFO L226 Difference]: Without dead ends: 271772 [2021-02-19 18:12:51,280 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:12:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271772 states. [2021-02-19 18:12:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271772 to 172077. [2021-02-19 18:12:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172077 states, 172076 states have (on average 4.845667030846835) internal successors, (833823), 172076 states have internal predecessors, (833823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172077 states to 172077 states and 833823 transitions. [2021-02-19 18:12:59,357 INFO L78 Accepts]: Start accepts. Automaton has 172077 states and 833823 transitions. Word has length 41 [2021-02-19 18:12:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:12:59,359 INFO L480 AbstractCegarLoop]: Abstraction has 172077 states and 833823 transitions. [2021-02-19 18:12:59,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:12:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 172077 states and 833823 transitions. [2021-02-19 18:12:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:12:59,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:12:59,949 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:13:00,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 18:13:00,149 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:13:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:00,150 INFO L82 PathProgramCache]: Analyzing trace with hash 373468198, now seen corresponding path program 33 times [2021-02-19 18:13:00,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:00,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236564106] [2021-02-19 18:13:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:00,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236564106] [2021-02-19 18:13:00,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899605017] [2021-02-19 18:13:00,242 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:13:00,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:13:00,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:13:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:13:00,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:13:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:00,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:13:00,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 18:13:00,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076930877] [2021-02-19 18:13:00,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:13:00,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:13:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:13:00,434 INFO L87 Difference]: Start difference. First operand 172077 states and 833823 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:04,690 INFO L93 Difference]: Finished difference Result 421279 states and 2020655 transitions. [2021-02-19 18:13:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:13:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:13:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:07,570 INFO L225 Difference]: With dead ends: 421279 [2021-02-19 18:13:07,570 INFO L226 Difference]: Without dead ends: 417312 [2021-02-19 18:13:07,571 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:13:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417312 states. [2021-02-19 18:13:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417312 to 264381. [2021-02-19 18:13:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264381 states, 264380 states have (on average 4.960484908086845) internal successors, (1311453), 264380 states have internal predecessors, (1311453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264381 states to 264381 states and 1311453 transitions. [2021-02-19 18:13:21,271 INFO L78 Accepts]: Start accepts. Automaton has 264381 states and 1311453 transitions. Word has length 41 [2021-02-19 18:13:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:21,271 INFO L480 AbstractCegarLoop]: Abstraction has 264381 states and 1311453 transitions. [2021-02-19 18:13:21,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 264381 states and 1311453 transitions. [2021-02-19 18:13:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:13:23,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:13:23,540 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:13:23,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:13:23,754 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:13:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -342634270, now seen corresponding path program 34 times [2021-02-19 18:13:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688671881] [2021-02-19 18:13:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:23,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688671881] [2021-02-19 18:13:23,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622852100] [2021-02-19 18:13:23,915 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:13:24,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:13:24,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:13:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:13:24,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:13:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:24,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:13:24,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 18:13:24,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056278476] [2021-02-19 18:13:24,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:13:24,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:24,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:13:24,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:13:24,241 INFO L87 Difference]: Start difference. First operand 264381 states and 1311453 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:29,019 INFO L93 Difference]: Finished difference Result 352198 states and 1704934 transitions. [2021-02-19 18:13:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:13:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:13:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:31,587 INFO L225 Difference]: With dead ends: 352198 [2021-02-19 18:13:31,587 INFO L226 Difference]: Without dead ends: 351878 [2021-02-19 18:13:31,588 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:13:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351878 states. [2021-02-19 18:13:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351878 to 238270. [2021-02-19 18:13:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238270 states, 238269 states have (on average 4.929269019469591) internal successors, (1174492), 238269 states have internal predecessors, (1174492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238270 states to 238270 states and 1174492 transitions. [2021-02-19 18:13:43,040 INFO L78 Accepts]: Start accepts. Automaton has 238270 states and 1174492 transitions. Word has length 41 [2021-02-19 18:13:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:43,040 INFO L480 AbstractCegarLoop]: Abstraction has 238270 states and 1174492 transitions. [2021-02-19 18:13:43,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 238270 states and 1174492 transitions. [2021-02-19 18:13:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 18:13:43,736 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:13:43,736 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-02-19 18:13:43,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 18:13:43,937 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:13:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1317842462, now seen corresponding path program 35 times [2021-02-19 18:13:43,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:43,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775110318] [2021-02-19 18:13:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:44,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775110318] [2021-02-19 18:13:44,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855283820] [2021-02-19 18:13:44,026 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:13:44,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:13:44,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:13:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 18:13:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:13:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:44,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:13:44,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:13:44,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040306899] [2021-02-19 18:13:44,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:13:44,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:44,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:13:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:13:44,241 INFO L87 Difference]: Start difference. First operand 238270 states and 1174492 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:47,653 INFO L93 Difference]: Finished difference Result 313342 states and 1530219 transitions. [2021-02-19 18:13:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:13:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 18:13:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:49,957 INFO L225 Difference]: With dead ends: 313342 [2021-02-19 18:13:49,957 INFO L226 Difference]: Without dead ends: 310500 [2021-02-19 18:13:49,958 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:13:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310500 states. [2021-02-19 18:13:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310500 to 134690. [2021-02-19 18:13:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134690 states, 134689 states have (on average 4.812145015554351) internal successors, (648143), 134689 states have internal predecessors, (648143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134690 states to 134690 states and 648143 transitions. [2021-02-19 18:13:56,913 INFO L78 Accepts]: Start accepts. Automaton has 134690 states and 648143 transitions. Word has length 41 [2021-02-19 18:13:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:56,913 INFO L480 AbstractCegarLoop]: Abstraction has 134690 states and 648143 transitions. [2021-02-19 18:13:56,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:13:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 134690 states and 648143 transitions. [2021-02-19 18:13:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 18:13:57,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:13:57,279 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-02-19 18:13:57,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 18:13:57,480 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:13:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 507356052, now seen corresponding path program 36 times [2021-02-19 18:13:57,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:57,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122780940] [2021-02-19 18:13:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:13:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122780940] [2021-02-19 18:13:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674794742] [2021-02-19 18:13:57,558 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:13:57,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:13:57,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:13:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:13:57,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:13:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:13:57,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:13:57,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:13:57,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296213769] [2021-02-19 18:13:57,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:13:57,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:57,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:13:57,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:13:57,746 INFO L87 Difference]: Start difference. First operand 134690 states and 648143 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:01,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:14:01,468 INFO L93 Difference]: Finished difference Result 319506 states and 1518920 transitions. [2021-02-19 18:14:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:14:01,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 18:14:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:14:03,716 INFO L225 Difference]: With dead ends: 319506 [2021-02-19 18:14:03,716 INFO L226 Difference]: Without dead ends: 318460 [2021-02-19 18:14:03,716 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:14:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318460 states. [2021-02-19 18:14:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318460 to 128351. [2021-02-19 18:14:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128351 states, 128350 states have (on average 4.731468640436307) internal successors, (607284), 128350 states have internal predecessors, (607284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128351 states to 128351 states and 607284 transitions. [2021-02-19 18:14:09,519 INFO L78 Accepts]: Start accepts. Automaton has 128351 states and 607284 transitions. Word has length 43 [2021-02-19 18:14:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:14:09,519 INFO L480 AbstractCegarLoop]: Abstraction has 128351 states and 607284 transitions. [2021-02-19 18:14:09,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 128351 states and 607284 transitions. [2021-02-19 18:14:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 18:14:09,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:14:09,812 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-02-19 18:14:10,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 18:14:10,013 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:14:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:14:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash -110141992, now seen corresponding path program 37 times [2021-02-19 18:14:10,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:14:10,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63772034] [2021-02-19 18:14:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:14:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:14:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:14:10,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63772034] [2021-02-19 18:14:10,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320595041] [2021-02-19 18:14:10,053 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:14:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:14:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:14:10,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:14:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:14:10,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:14:10,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 18:14:10,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175103056] [2021-02-19 18:14:10,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:14:10,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:14:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:14:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:14:10,185 INFO L87 Difference]: Start difference. First operand 128351 states and 607284 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:11,185 WARN L202 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-02-19 18:14:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:14:14,598 INFO L93 Difference]: Finished difference Result 326630 states and 1488472 transitions. [2021-02-19 18:14:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:14:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 18:14:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:14:16,004 INFO L225 Difference]: With dead ends: 326630 [2021-02-19 18:14:16,005 INFO L226 Difference]: Without dead ends: 323142 [2021-02-19 18:14:16,005 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 18:14:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323142 states. [2021-02-19 18:14:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323142 to 144961. [2021-02-19 18:14:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144961 states, 144960 states have (on average 4.735099337748345) internal successors, (686400), 144960 states have internal predecessors, (686400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144961 states to 144961 states and 686400 transitions. [2021-02-19 18:14:23,718 INFO L78 Accepts]: Start accepts. Automaton has 144961 states and 686400 transitions. Word has length 43 [2021-02-19 18:14:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:14:23,718 INFO L480 AbstractCegarLoop]: Abstraction has 144961 states and 686400 transitions. [2021-02-19 18:14:23,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 144961 states and 686400 transitions. [2021-02-19 18:14:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 18:14:24,145 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:14:24,145 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-02-19 18:14:24,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 18:14:24,345 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:14:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:14:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1943806428, now seen corresponding path program 38 times [2021-02-19 18:14:24,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:14:24,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100960587] [2021-02-19 18:14:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:14:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:14:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:14:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100960587] [2021-02-19 18:14:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650908113] [2021-02-19 18:14:24,394 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:14:24,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:14:24,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:14:24,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:14:24,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:14:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:14:24,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:14:24,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-02-19 18:14:24,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542238052] [2021-02-19 18:14:24,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:14:24,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:14:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:14:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:14:24,577 INFO L87 Difference]: Start difference. First operand 144961 states and 686400 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:14:27,223 INFO L93 Difference]: Finished difference Result 252971 states and 1191139 transitions. [2021-02-19 18:14:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:14:27,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 18:14:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:14:29,032 INFO L225 Difference]: With dead ends: 252971 [2021-02-19 18:14:29,032 INFO L226 Difference]: Without dead ends: 252073 [2021-02-19 18:14:29,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:14:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252073 states. [2021-02-19 18:14:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252073 to 102134. [2021-02-19 18:14:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-02-19 18:14:34,368 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-02-19 18:14:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:14:34,368 INFO L480 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-02-19 18:14:34,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-02-19 18:14:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 18:14:34,657 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:14:34,657 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-02-19 18:14:34,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:14:34,866 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:14:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:14:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1245080412, now seen corresponding path program 39 times [2021-02-19 18:14:34,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:14:34,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251619875] [2021-02-19 18:14:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:14:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:14:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:14:34,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251619875] [2021-02-19 18:14:34,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616365248] [2021-02-19 18:14:34,930 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:14:34,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:14:34,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:14:34,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:14:34,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:14:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:14:35,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:14:35,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 18:14:35,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718113647] [2021-02-19 18:14:35,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:14:35,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:14:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:14:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:14:35,102 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:14:39,552 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-02-19 18:14:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:14:39,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 18:14:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:14:42,042 INFO L225 Difference]: With dead ends: 359669 [2021-02-19 18:14:42,043 INFO L226 Difference]: Without dead ends: 358139 [2021-02-19 18:14:42,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:14:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-02-19 18:14:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-02-19 18:14:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-02-19 18:14:49,495 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-02-19 18:14:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:14:49,495 INFO L480 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-02-19 18:14:49,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-02-19 18:14:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 18:14:49,838 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:14:49,838 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-02-19 18:14:50,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 18:14:50,039 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:14:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:14:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1043025696, now seen corresponding path program 40 times [2021-02-19 18:14:50,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:14:50,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583755621] [2021-02-19 18:14:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:14:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:14:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:14:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583755621] [2021-02-19 18:14:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673389079] [2021-02-19 18:14:50,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:14:50,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:14:50,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:14:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:14:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:14:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:14:50,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:14:50,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-02-19 18:14:50,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120487770] [2021-02-19 18:14:50,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:14:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:14:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:14:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:14:50,237 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:14:50,996 WARN L202 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-02-19 18:14:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:14:54,006 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-02-19 18:14:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:14:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 18:14:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:14:56,198 INFO L225 Difference]: With dead ends: 318028 [2021-02-19 18:14:56,198 INFO L226 Difference]: Without dead ends: 317616 [2021-02-19 18:14:56,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:14:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-02-19 18:15:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-02-19 18:15:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-02-19 18:15:03,924 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-02-19 18:15:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:03,924 INFO L480 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-02-19 18:15:03,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-02-19 18:15:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 18:15:04,409 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:04,409 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-02-19 18:15:04,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:04,611 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:15:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:04,611 INFO L82 PathProgramCache]: Analyzing trace with hash 817280082, now seen corresponding path program 41 times [2021-02-19 18:15:04,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:04,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161571478] [2021-02-19 18:15:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-19 18:15:04,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161571478] [2021-02-19 18:15:04,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368956640] [2021-02-19 18:15:04,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:04,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:15:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:04,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:15:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-19 18:15:04,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:04,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-02-19 18:15:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582958890] [2021-02-19 18:15:04,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:15:04,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:15:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:15:04,853 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:13,723 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-02-19 18:15:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:15:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 18:15:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:19,103 INFO L225 Difference]: With dead ends: 593260 [2021-02-19 18:15:19,104 INFO L226 Difference]: Without dead ends: 584415 [2021-02-19 18:15:19,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:15:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-02-19 18:15:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-02-19 18:15:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-02-19 18:15:31,669 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-02-19 18:15:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:31,669 INFO L480 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-02-19 18:15:31,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-02-19 18:15:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 18:15:32,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:32,277 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-02-19 18:15:32,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:32,478 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:15:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1819298718, now seen corresponding path program 42 times [2021-02-19 18:15:32,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:32,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71817672] [2021-02-19 18:15:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-02-19 18:15:32,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71817672] [2021-02-19 18:15:32,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881347922] [2021-02-19 18:15:32,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:32,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:15:32,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:15:32,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:15:32,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-02-19 18:15:32,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:32,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-02-19 18:15:32,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81299717] [2021-02-19 18:15:32,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:15:32,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:15:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:15:32,714 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:39,409 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-02-19 18:15:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-02-19 18:15:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 18:15:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:15:42,729 INFO L225 Difference]: With dead ends: 489163 [2021-02-19 18:15:42,729 INFO L226 Difference]: Without dead ends: 486417 [2021-02-19 18:15:42,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-02-19 18:15:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-02-19 18:15:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-02-19 18:15:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-02-19 18:15:54,533 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-02-19 18:15:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:15:54,534 INFO L480 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-02-19 18:15:54,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-02-19 18:15:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 18:15:55,175 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:15:55,175 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-02-19 18:15:55,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 18:15:55,375 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:15:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:15:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 745117998, now seen corresponding path program 43 times [2021-02-19 18:15:55,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:15:55,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784021614] [2021-02-19 18:15:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:15:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:15:55,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784021614] [2021-02-19 18:15:55,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049346061] [2021-02-19 18:15:55,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:15:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:15:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:15:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:15:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 18:15:55,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:15:55,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-02-19 18:15:55,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725873568] [2021-02-19 18:15:55,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:15:55,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:15:55,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:15:55,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:15:55,629 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:15:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:15:59,392 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-02-19 18:15:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:15:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 18:15:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:01,887 INFO L225 Difference]: With dead ends: 345677 [2021-02-19 18:16:01,888 INFO L226 Difference]: Without dead ends: 344598 [2021-02-19 18:16:01,888 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:16:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-02-19 18:16:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-02-19 18:16:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-02-19 18:16:10,832 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-02-19 18:16:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:10,832 INFO L480 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-02-19 18:16:10,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-02-19 18:16:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 18:16:12,200 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:12,200 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-02-19 18:16:12,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:16:12,414 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:16:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1503283354, now seen corresponding path program 44 times [2021-02-19 18:16:12,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:12,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711555302] [2021-02-19 18:16:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-02-19 18:16:12,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711555302] [2021-02-19 18:16:12,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877025848] [2021-02-19 18:16:12,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:16:12,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:16:12,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:16:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:16:12,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:12,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-02-19 18:16:12,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422041135] [2021-02-19 18:16:12,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 18:16:12,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 18:16:12,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:16:12,755 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:18,128 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-02-19 18:16:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:16:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 18:16:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:20,328 INFO L225 Difference]: With dead ends: 362878 [2021-02-19 18:16:20,328 INFO L226 Difference]: Without dead ends: 361792 [2021-02-19 18:16:20,328 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:16:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-02-19 18:16:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-02-19 18:16:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-02-19 18:16:31,773 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-02-19 18:16:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:16:31,773 INFO L480 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-02-19 18:16:31,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-02-19 18:16:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 18:16:32,613 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:16:32,613 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-02-19 18:16:32,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 18:16:32,814 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:16:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:16:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1523705890, now seen corresponding path program 45 times [2021-02-19 18:16:32,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:16:32,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002051459] [2021-02-19 18:16:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:16:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:16:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 18:16:32,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002051459] [2021-02-19 18:16:32,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091253995] [2021-02-19 18:16:32,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:16:32,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:16:32,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:16:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 18:16:32,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:16:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 18:16:33,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:16:33,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-02-19 18:16:33,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750304748] [2021-02-19 18:16:33,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:16:33,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:16:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:16:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:16:33,068 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:16:34,382 WARN L202 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-02-19 18:16:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:16:41,352 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-02-19 18:16:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-02-19 18:16:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 18:16:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:16:45,172 INFO L225 Difference]: With dead ends: 557436 [2021-02-19 18:16:45,172 INFO L226 Difference]: Without dead ends: 555086 [2021-02-19 18:16:45,173 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-02-19 18:16:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. Received shutdown request... [2021-02-19 18:16:50,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:16:50,050 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 18:16:50,053 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 18:16:50,054 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:16:50 BasicIcfg [2021-02-19 18:16:50,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:16:50,054 INFO L168 Benchmark]: Toolchain (without parser) took 392778.81 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.6 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-02-19 18:16:50,054 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 160.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:16:50,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.68 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:16:50,054 INFO L168 Benchmark]: Boogie Preprocessor took 13.74 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 930.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:16:50,054 INFO L168 Benchmark]: RCFGBuilder took 303.89 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 234.5 MB in the end (delta: -993.3 kB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. [2021-02-19 18:16:50,055 INFO L168 Benchmark]: TraceAbstraction took 392427.95 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 233.9 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-02-19 18:16:50,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 160.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.68 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.74 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 930.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 303.89 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 234.5 MB in the end (delta: -993.3 kB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 392427.95 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 233.9 MB in the beginning and 10.0 GB in the end (delta: -9.7 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 82). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 392.3s, OverallIterations: 56, TraceHistogramMax: 3, AutomataDifference: 152.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 3871 SDtfs, 19440 SDslu, 25297 SDs, 0 SdLazy, 12953 SolverSat, 2263 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2986 GetRequests, 1667 SyntacticMatches, 1 SemanticMatches, 1318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16946 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265120occurred in iteration=55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 198.9s AutomataMinimizationTime, 56 MinimizatonAttempts, 3061521 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 3939 NumberOfCodeBlocks, 3925 NumberOfCodeBlocksAsserted, 169 NumberOfCheckSat, 3836 ConstructedInterpolants, 0 QuantifiedInterpolants, 902128 SizeOfPredicates, 134 NumberOfNonLiveVariables, 4888 ConjunctsInSsa, 527 ConjunctsInUnsatCore, 103 InterpolantComputations, 10 PerfectInterpolantSequences, 632/1346 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown