/usr/bin/java -Xmx8000000000 -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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:54:36,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:54:36,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:54:36,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:54:36,280 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 [2021-07-09 17:54:36,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:54:36,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:54:36,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:54:36,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:54:36,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:54:36,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:54:36,313 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:54:36,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:54:36,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:54:36,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:54:36,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:54:36,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:54:36,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:54:36,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:54:36,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:54:36,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:54:36,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:54:36,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:54:36,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:54:36,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:54:36,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:54:36,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:54:36,324 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:54:36,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:54:36,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:54:36,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:54:36,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:54:36,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:54:36,576 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:54:36,581 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:54:36,581 INFO L432 ainManager$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 [2021-07-09 17:54:36,582 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-07-09 17:54:36,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:54:36,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:54:36,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:54:36,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:54:36,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:54:36,618 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 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,622 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 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:54:36,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:54:36,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:54:36,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:54:36,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/1) ... [2021-07-09 17:54:36,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:54:36,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:54:36,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:54:36,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:54:36,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (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 [2021-07-09 17:54:36,702 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:54:36,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:54:36,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:54:36,702 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:54:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:54:36,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:54:36,703 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:54:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:54:36,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:54:36,703 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:54:36,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:54:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:54:36,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:54:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:54:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:54:36,705 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:54:36,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:54:36,857 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:54:36,858 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:54:36 BoogieIcfgContainer [2021-07-09 17:54:36,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:54:36,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:54:36,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:54:36,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:54:36,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:54:36" (1/2) ... [2021-07-09 17:54:36,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ada867e and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:54:36, skipping insertion in model container [2021-07-09 17:54:36,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:54:36" (2/2) ... [2021-07-09 17:54:36,866 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-07-09 17:54:36,869 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:54:36,870 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:54:36,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:54:36,870 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:54:36,902 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 17:54:36,916 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 17:54:36,937 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:54:36,937 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:54:36,937 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:54:36,937 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:54:36,937 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:54:36,938 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:54:36,938 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:54:36,938 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:54:36,944 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-07-09 17:54:37,005 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:54:37,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:37,022 INFO L508 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] [2021-07-09 17:54:37,022 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:37,026 INFO L82 PathProgramCache]: Analyzing trace with hash -713041554, now seen corresponding path program 1 times [2021-07-09 17:54:37,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:37,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158308721] [2021-07-09 17:54:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:37,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158308721] [2021-07-09 17:54:37,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158308721] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:37,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:37,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:54:37,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762439381] [2021-07-09 17:54:37,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:54:37,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:54:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:54:37,279 INFO L87 Difference]: Start difference. First operand has 435 states, 434 states have (on average 3.8225806451612905) internal successors, (1659), 434 states have internal predecessors, (1659), 0 states have call successors, (0), 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) [2021-07-09 17:54:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:37,370 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-07-09 17:54:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:54:37,371 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 [2021-07-09 17:54:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:37,398 INFO L225 Difference]: With dead ends: 1267 [2021-07-09 17:54:37,398 INFO L226 Difference]: Without dead ends: 1056 [2021-07-09 17:54:37,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:54:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-07-09 17:54:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-07-09 17:54:37,492 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) [2021-07-09 17:54:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-07-09 17:54:37,499 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-07-09 17:54:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:37,500 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-07-09 17:54:37,500 INFO L483 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) [2021-07-09 17:54:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-07-09 17:54:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:54:37,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:37,508 INFO L508 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] [2021-07-09 17:54:37,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:54:37,509 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:37,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1268433296, now seen corresponding path program 1 times [2021-07-09 17:54:37,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:37,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708268732] [2021-07-09 17:54:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:37,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708268732] [2021-07-09 17:54:37,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708268732] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:37,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:37,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:54:37,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828223913] [2021-07-09 17:54:37,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:54:37,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:37,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:54:37,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:54:37,580 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) [2021-07-09 17:54:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:37,727 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-07-09 17:54:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:54:37,728 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 [2021-07-09 17:54:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:37,736 INFO L225 Difference]: With dead ends: 1405 [2021-07-09 17:54:37,736 INFO L226 Difference]: Without dead ends: 1369 [2021-07-09 17:54:37,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:54:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-09 17:54:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-07-09 17:54:37,763 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) [2021-07-09 17:54:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-07-09 17:54:37,767 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-07-09 17:54:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:37,767 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-07-09 17:54:37,768 INFO L483 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) [2021-07-09 17:54:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-07-09 17:54:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:54:37,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:37,771 INFO L508 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] [2021-07-09 17:54:37,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:54:37,772 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 132844912, now seen corresponding path program 1 times [2021-07-09 17:54:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:37,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42510488] [2021-07-09 17:54:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:37,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42510488] [2021-07-09 17:54:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42510488] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:37,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:37,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:54:37,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332988958] [2021-07-09 17:54:37,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:54:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:37,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:54:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:54:37,838 INFO L87 Difference]: Start difference. First operand 903 states and 3437 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) [2021-07-09 17:54:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:37,942 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2021-07-09 17:54:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:54:37,944 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 [2021-07-09 17:54:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:37,954 INFO L225 Difference]: With dead ends: 1359 [2021-07-09 17:54:37,954 INFO L226 Difference]: Without dead ends: 1327 [2021-07-09 17:54:37,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-07-09 17:54:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2021-07-09 17:54:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2021-07-09 17:54:37,992 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2021-07-09 17:54:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:37,993 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2021-07-09 17:54:37,993 INFO L483 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) [2021-07-09 17:54:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2021-07-09 17:54:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:54:37,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:37,998 INFO L508 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] [2021-07-09 17:54:37,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:54:37,998 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-07-09 17:54:37,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:38,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751162902] [2021-07-09 17:54:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:38,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751162902] [2021-07-09 17:54:38,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751162902] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:38,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:38,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:54:38,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277688226] [2021-07-09 17:54:38,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:54:38,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:38,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:54:38,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:54:38,081 INFO L87 Difference]: Start difference. First operand 931 states and 3519 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) [2021-07-09 17:54:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,149 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2021-07-09 17:54:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:54:38,149 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 [2021-07-09 17:54:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:38,155 INFO L225 Difference]: With dead ends: 1126 [2021-07-09 17:54:38,156 INFO L226 Difference]: Without dead ends: 1044 [2021-07-09 17:54:38,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:54:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-07-09 17:54:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2021-07-09 17:54:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2021-07-09 17:54:38,184 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2021-07-09 17:54:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:38,184 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2021-07-09 17:54:38,184 INFO L483 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) [2021-07-09 17:54:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2021-07-09 17:54:38,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:54:38,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:38,187 INFO L508 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] [2021-07-09 17:54:38,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:54:38,187 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2011026324, now seen corresponding path program 2 times [2021-07-09 17:54:38,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:38,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220355445] [2021-07-09 17:54:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:38,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220355445] [2021-07-09 17:54:38,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220355445] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:38,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:38,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:54:38,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803698704] [2021-07-09 17:54:38,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:54:38,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:38,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:54:38,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:54:38,210 INFO L87 Difference]: Start difference. First operand 845 states and 3193 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) [2021-07-09 17:54:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,270 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2021-07-09 17:54:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:54:38,271 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 [2021-07-09 17:54:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:38,278 INFO L225 Difference]: With dead ends: 1296 [2021-07-09 17:54:38,278 INFO L226 Difference]: Without dead ends: 1276 [2021-07-09 17:54:38,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:54:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-09 17:54:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2021-07-09 17:54:38,306 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) [2021-07-09 17:54:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-07-09 17:54:38,312 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-07-09 17:54:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:38,312 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-07-09 17:54:38,312 INFO L483 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) [2021-07-09 17:54:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-07-09 17:54:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:54:38,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:38,318 INFO L508 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] [2021-07-09 17:54:38,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:54:38,318 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-07-09 17:54:38,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:38,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215637404] [2021-07-09 17:54:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:38,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215637404] [2021-07-09 17:54:38,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215637404] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:38,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:38,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:54:38,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482497492] [2021-07-09 17:54:38,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:54:38,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:38,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:54:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:54:38,373 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) [2021-07-09 17:54:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,460 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-07-09 17:54:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:54:38,461 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 [2021-07-09 17:54:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:38,469 INFO L225 Difference]: With dead ends: 1772 [2021-07-09 17:54:38,470 INFO L226 Difference]: Without dead ends: 1752 [2021-07-09 17:54:38,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:54:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-07-09 17:54:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-07-09 17:54:38,504 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) [2021-07-09 17:54:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-07-09 17:54:38,519 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-07-09 17:54:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:38,521 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-07-09 17:54:38,521 INFO L483 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) [2021-07-09 17:54:38,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-07-09 17:54:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:54:38,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:38,524 INFO L508 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] [2021-07-09 17:54:38,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:54:38,524 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-07-09 17:54:38,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:38,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492438806] [2021-07-09 17:54:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492438806] [2021-07-09 17:54:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492438806] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:38,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:38,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:54:38,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505218152] [2021-07-09 17:54:38,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:54:38,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:54:38,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:54:38,635 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) [2021-07-09 17:54:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,689 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-07-09 17:54:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:54:38,689 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 [2021-07-09 17:54:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:38,695 INFO L225 Difference]: With dead ends: 1137 [2021-07-09 17:54:38,695 INFO L226 Difference]: Without dead ends: 1137 [2021-07-09 17:54:38,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:54:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-07-09 17:54:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-07-09 17:54:38,717 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) [2021-07-09 17:54:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-07-09 17:54:38,720 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-07-09 17:54:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:38,721 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-07-09 17:54:38,721 INFO L483 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) [2021-07-09 17:54:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-07-09 17:54:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:54:38,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:38,723 INFO L508 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] [2021-07-09 17:54:38,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:54:38,724 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:38,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-07-09 17:54:38,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:38,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357541978] [2021-07-09 17:54:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357541978] [2021-07-09 17:54:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357541978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795008044] [2021-07-09 17:54:38,771 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 [2021-07-09 17:54:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:54:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:38,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795008044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:38,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:38,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 17:54:38,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965671819] [2021-07-09 17:54:38,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:54:38,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:38,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:54:38,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:54:38,960 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) [2021-07-09 17:54:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:39,054 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-07-09 17:54:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:54:39,055 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 [2021-07-09 17:54:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:39,061 INFO L225 Difference]: With dead ends: 1388 [2021-07-09 17:54:39,061 INFO L226 Difference]: Without dead ends: 1388 [2021-07-09 17:54:39,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-07-09 17:54:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-07-09 17:54:39,089 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) [2021-07-09 17:54:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-07-09 17:54:39,092 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-07-09 17:54:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:39,092 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-07-09 17:54:39,092 INFO L483 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) [2021-07-09 17:54:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-07-09 17:54:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:54:39,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:39,095 INFO L508 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] [2021-07-09 17:54:39,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-07-09 17:54:39,309 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:39,309 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-07-09 17:54:39,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:39,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842751445] [2021-07-09 17:54:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:39,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:39,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842751445] [2021-07-09 17:54:39,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842751445] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:39,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:39,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:54:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997728858] [2021-07-09 17:54:39,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:54:39,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:39,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:54:39,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:54:39,341 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) [2021-07-09 17:54:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:39,380 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-07-09 17:54:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:54:39,380 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 [2021-07-09 17:54:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:39,385 INFO L225 Difference]: With dead ends: 1113 [2021-07-09 17:54:39,385 INFO L226 Difference]: Without dead ends: 1113 [2021-07-09 17:54:39,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:54:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-07-09 17:54:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-07-09 17:54:39,423 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) [2021-07-09 17:54:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-07-09 17:54:39,426 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-07-09 17:54:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:39,426 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-07-09 17:54:39,426 INFO L483 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) [2021-07-09 17:54:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-07-09 17:54:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:39,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:39,429 INFO L508 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] [2021-07-09 17:54:39,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:54:39,429 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-07-09 17:54:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:39,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709254573] [2021-07-09 17:54:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:39,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:39,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709254573] [2021-07-09 17:54:39,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709254573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667823090] [2021-07-09 17:54:39,457 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 [2021-07-09 17:54:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:54:39,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:39,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667823090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:39,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:54:39,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802572434] [2021-07-09 17:54:39,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:54:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:39,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:54:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:54:39,563 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) [2021-07-09 17:54:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:39,617 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-07-09 17:54:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:54:39,617 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 [2021-07-09 17:54:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:39,623 INFO L225 Difference]: With dead ends: 1404 [2021-07-09 17:54:39,623 INFO L226 Difference]: Without dead ends: 1404 [2021-07-09 17:54:39,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:54:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-07-09 17:54:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-07-09 17:54:39,653 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) [2021-07-09 17:54:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-07-09 17:54:39,657 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-07-09 17:54:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:39,658 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-07-09 17:54:39,658 INFO L483 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) [2021-07-09 17:54:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-07-09 17:54:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:54:39,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:39,661 INFO L508 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] [2021-07-09 17:54:39,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:54:39,877 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-07-09 17:54:39,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:39,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265547404] [2021-07-09 17:54:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:39,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:39,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265547404] [2021-07-09 17:54:39,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265547404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575441517] [2021-07-09 17:54:39,905 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 [2021-07-09 17:54:39,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:39,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:54:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:40,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575441517] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:40,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:54:40,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-07-09 17:54:40,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802440173] [2021-07-09 17:54:40,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:54:40,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:40,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:54:40,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:54:40,023 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) [2021-07-09 17:54:40,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:40,051 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-07-09 17:54:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:54:40,051 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 [2021-07-09 17:54:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:40,055 INFO L225 Difference]: With dead ends: 1123 [2021-07-09 17:54:40,055 INFO L226 Difference]: Without dead ends: 1063 [2021-07-09 17:54:40,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:54:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-07-09 17:54:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-07-09 17:54:40,072 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) [2021-07-09 17:54:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-07-09 17:54:40,077 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-07-09 17:54:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:40,077 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-07-09 17:54:40,077 INFO L483 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) [2021-07-09 17:54:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-07-09 17:54:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:40,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:40,080 INFO L508 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] [2021-07-09 17:54:40,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 17:54:40,293 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-07-09 17:54:40,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:40,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021315885] [2021-07-09 17:54:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:40,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:40,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021315885] [2021-07-09 17:54:40,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021315885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:40,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219624274] [2021-07-09 17:54:40,341 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 [2021-07-09 17:54:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:54:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:54:40,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219624274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:40,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:40,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 17:54:40,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415988650] [2021-07-09 17:54:40,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:54:40,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:40,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:54:40,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:54:40,499 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:40,563 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-07-09 17:54:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:54:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:40,575 INFO L225 Difference]: With dead ends: 3683 [2021-07-09 17:54:40,576 INFO L226 Difference]: Without dead ends: 3245 [2021-07-09 17:54:40,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:54:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-07-09 17:54:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-07-09 17:54:40,639 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) [2021-07-09 17:54:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-07-09 17:54:40,650 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-07-09 17:54:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:40,650 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-07-09 17:54:40,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-07-09 17:54:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:40,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:40,656 INFO L508 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] [2021-07-09 17:54:40,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:40,869 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:40,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-07-09 17:54:40,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:40,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997073716] [2021-07-09 17:54:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:40,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:40,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997073716] [2021-07-09 17:54:40,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997073716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:40,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268984812] [2021-07-09 17:54:40,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:54:40,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:40,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:54:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268984812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:41,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:41,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 17:54:41,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209833708] [2021-07-09 17:54:41,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:54:41,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:41,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:54:41,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:54:41,063 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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) [2021-07-09 17:54:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:41,154 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-07-09 17:54:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:54:41,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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 33 [2021-07-09 17:54:41,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:41,177 INFO L225 Difference]: With dead ends: 5705 [2021-07-09 17:54:41,177 INFO L226 Difference]: Without dead ends: 5282 [2021-07-09 17:54:41,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:54:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-07-09 17:54:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-07-09 17:54:41,278 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) [2021-07-09 17:54:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-07-09 17:54:41,288 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-07-09 17:54:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:41,288 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-07-09 17:54:41,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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) [2021-07-09 17:54:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-07-09 17:54:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:41,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:41,296 INFO L508 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] [2021-07-09 17:54:41,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:54:41,505 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:41,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-07-09 17:54:41,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:41,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474110967] [2021-07-09 17:54:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:41,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:41,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474110967] [2021-07-09 17:54:41,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474110967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:41,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169156386] [2021-07-09 17:54:41,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:54:41,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:54:41,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:41,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:54:41,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:41,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169156386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:41,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:41,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 17:54:41,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902550891] [2021-07-09 17:54:41,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:54:41,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:54:41,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:54:41,668 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) [2021-07-09 17:54:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:41,761 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-07-09 17:54:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:54:41,762 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 [2021-07-09 17:54:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:41,779 INFO L225 Difference]: With dead ends: 5724 [2021-07-09 17:54:41,780 INFO L226 Difference]: Without dead ends: 5132 [2021-07-09 17:54:41,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:54:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-07-09 17:54:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-07-09 17:54:41,851 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) [2021-07-09 17:54:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-07-09 17:54:41,858 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-07-09 17:54:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:41,859 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-07-09 17:54:41,859 INFO L483 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) [2021-07-09 17:54:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-07-09 17:54:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:54:41,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:41,865 INFO L508 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] [2021-07-09 17:54:42,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:42,078 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:42,078 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-07-09 17:54:42,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:42,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902369175] [2021-07-09 17:54:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:42,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:42,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902369175] [2021-07-09 17:54:42,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902369175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:42,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990688134] [2021-07-09 17:54:42,119 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 [2021-07-09 17:54:42,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:54:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:42,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990688134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:42,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:42,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:54:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425008357] [2021-07-09 17:54:42,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:54:42,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:54:42,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:54:42,304 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) [2021-07-09 17:54:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:42,667 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-07-09 17:54:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:54:42,667 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 [2021-07-09 17:54:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:42,686 INFO L225 Difference]: With dead ends: 6143 [2021-07-09 17:54:42,686 INFO L226 Difference]: Without dead ends: 6077 [2021-07-09 17:54:42,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-07-09 17:54:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-07-09 17:54:42,767 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) [2021-07-09 17:54:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-07-09 17:54:42,774 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-07-09 17:54:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:42,775 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-07-09 17:54:42,775 INFO L483 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) [2021-07-09 17:54:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-07-09 17:54:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:54:42,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:42,782 INFO L508 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] [2021-07-09 17:54:42,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:54:42,997 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-07-09 17:54:42,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:42,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523405675] [2021-07-09 17:54:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:43,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523405675] [2021-07-09 17:54:43,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523405675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340269062] [2021-07-09 17:54:43,026 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 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 [2021-07-09 17:54:43,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:54:43,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:43,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:54:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:43,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340269062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:43,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:43,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:54:43,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602114923] [2021-07-09 17:54:43,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:54:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:54:43,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:54:43,172 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) [2021-07-09 17:54:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:43,437 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-07-09 17:54:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:54:43,438 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 [2021-07-09 17:54:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:43,474 INFO L225 Difference]: With dead ends: 10702 [2021-07-09 17:54:43,475 INFO L226 Difference]: Without dead ends: 10294 [2021-07-09 17:54:43,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-07-09 17:54:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-07-09 17:54:43,647 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) [2021-07-09 17:54:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-07-09 17:54:43,668 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-07-09 17:54:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:43,668 INFO L482 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-07-09 17:54:43,669 INFO L483 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) [2021-07-09 17:54:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-07-09 17:54:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:54:43,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:43,685 INFO L508 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] [2021-07-09 17:54:43,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:54:43,901 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:43,902 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-07-09 17:54:43,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:43,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376633568] [2021-07-09 17:54:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:43,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:43,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376633568] [2021-07-09 17:54:43,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376633568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:43,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381491258] [2021-07-09 17:54:43,991 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 [2021-07-09 17:54:44,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:54:44,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:54:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:44,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381491258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:44,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:44,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 17:54:44,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797631807] [2021-07-09 17:54:44,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:54:44,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:44,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:54:44,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:44,135 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) [2021-07-09 17:54:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:44,580 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-07-09 17:54:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:54:44,581 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 [2021-07-09 17:54:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:44,603 INFO L225 Difference]: With dead ends: 7423 [2021-07-09 17:54:44,603 INFO L226 Difference]: Without dead ends: 7391 [2021-07-09 17:54:44,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:54:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-07-09 17:54:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-07-09 17:54:44,721 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) [2021-07-09 17:54:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-07-09 17:54:44,736 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-07-09 17:54:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:44,736 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-07-09 17:54:44,736 INFO L483 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) [2021-07-09 17:54:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-07-09 17:54:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:54:44,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:44,747 INFO L508 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] [2021-07-09 17:54:44,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:54:44,961 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-07-09 17:54:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:44,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726279817] [2021-07-09 17:54:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:45,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726279817] [2021-07-09 17:54:45,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726279817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176015402] [2021-07-09 17:54:45,004 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 [2021-07-09 17:54:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:54:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:45,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176015402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:45,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:45,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 17:54:45,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015196629] [2021-07-09 17:54:45,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:54:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:54:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:54:45,145 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) [2021-07-09 17:54:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:45,623 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-07-09 17:54:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:54:45,623 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 [2021-07-09 17:54:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:45,673 INFO L225 Difference]: With dead ends: 17746 [2021-07-09 17:54:45,673 INFO L226 Difference]: Without dead ends: 17648 [2021-07-09 17:54:45,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:54:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-07-09 17:54:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-07-09 17:54:45,967 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) [2021-07-09 17:54:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-07-09 17:54:45,996 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-07-09 17:54:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:45,996 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-07-09 17:54:45,996 INFO L483 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) [2021-07-09 17:54:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-07-09 17:54:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:54:46,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:46,015 INFO L508 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] [2021-07-09 17:54:46,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:54:46,229 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:46,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-07-09 17:54:46,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:46,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841253482] [2021-07-09 17:54:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:46,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841253482] [2021-07-09 17:54:46,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841253482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:46,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696756010] [2021-07-09 17:54:46,280 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 [2021-07-09 17:54:46,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:54:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:46,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696756010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:46,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:46,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:54:46,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694712756] [2021-07-09 17:54:46,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:54:46,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:46,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:54:46,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:46,430 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) [2021-07-09 17:54:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:46,908 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-07-09 17:54:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:54:46,909 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 [2021-07-09 17:54:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:46,977 INFO L225 Difference]: With dead ends: 21973 [2021-07-09 17:54:46,977 INFO L226 Difference]: Without dead ends: 21443 [2021-07-09 17:54:46,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-07-09 17:54:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-07-09 17:54:47,324 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) [2021-07-09 17:54:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-07-09 17:54:47,354 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-07-09 17:54:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:47,354 INFO L482 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-07-09 17:54:47,354 INFO L483 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) [2021-07-09 17:54:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-07-09 17:54:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:54:47,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:47,375 INFO L508 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] [2021-07-09 17:54:47,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:47,589 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-07-09 17:54:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:47,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413677005] [2021-07-09 17:54:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:47,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:47,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413677005] [2021-07-09 17:54:47,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413677005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:47,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417103672] [2021-07-09 17:54:47,619 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 [2021-07-09 17:54:47,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:54:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:54:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:47,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417103672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:47,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:47,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:54:47,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788963829] [2021-07-09 17:54:47,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:54:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:54:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:54:47,724 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) [2021-07-09 17:54:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:48,325 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-07-09 17:54:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:54:48,325 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 [2021-07-09 17:54:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:48,373 INFO L225 Difference]: With dead ends: 15939 [2021-07-09 17:54:48,373 INFO L226 Difference]: Without dead ends: 15563 [2021-07-09 17:54:48,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:54:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-07-09 17:54:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-07-09 17:54:48,740 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) [2021-07-09 17:54:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-07-09 17:54:48,781 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-07-09 17:54:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:48,781 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-07-09 17:54:48,781 INFO L483 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) [2021-07-09 17:54:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-07-09 17:54:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:54:48,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:48,806 INFO L508 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] [2021-07-09 17:54:49,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:49,015 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:49,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-07-09 17:54:49,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:49,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464123518] [2021-07-09 17:54:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:49,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:49,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464123518] [2021-07-09 17:54:49,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464123518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:49,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130734343] [2021-07-09 17:54:49,038 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 [2021-07-09 17:54:49,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:49,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:54:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:49,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130734343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:49,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:49,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-09 17:54:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575699125] [2021-07-09 17:54:49,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:54:49,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:54:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:54:49,155 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) [2021-07-09 17:54:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:49,411 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-07-09 17:54:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:54:49,411 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 [2021-07-09 17:54:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:49,470 INFO L225 Difference]: With dead ends: 17650 [2021-07-09 17:54:49,471 INFO L226 Difference]: Without dead ends: 17578 [2021-07-09 17:54:49,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:54:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-07-09 17:54:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-07-09 17:54:49,852 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) [2021-07-09 17:54:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-07-09 17:54:49,896 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-07-09 17:54:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:49,896 INFO L482 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-07-09 17:54:49,896 INFO L483 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) [2021-07-09 17:54:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-07-09 17:54:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 17:54:49,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:49,923 INFO L508 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] [2021-07-09 17:54:50,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:54:50,137 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:50,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-07-09 17:54:50,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:50,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144318592] [2021-07-09 17:54:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:54:50,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:50,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144318592] [2021-07-09 17:54:50,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144318592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:50,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969562282] [2021-07-09 17:54:50,169 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 [2021-07-09 17:54:50,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:50,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:54:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:50,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969562282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:50,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:50,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:54:50,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516376438] [2021-07-09 17:54:50,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:54:50,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:54:50,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:54:50,264 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) [2021-07-09 17:54:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:50,986 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-07-09 17:54:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:54:50,986 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 [2021-07-09 17:54:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:51,182 INFO L225 Difference]: With dead ends: 47667 [2021-07-09 17:54:51,182 INFO L226 Difference]: Without dead ends: 46072 [2021-07-09 17:54:51,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:54:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-07-09 17:54:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-07-09 17:54:52,334 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) [2021-07-09 17:54:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-07-09 17:54:52,613 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-07-09 17:54:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:52,613 INFO L482 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-07-09 17:54:52,613 INFO L483 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) [2021-07-09 17:54:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-07-09 17:54:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 17:54:52,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:52,691 INFO L508 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] [2021-07-09 17:54:52,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:52,892 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-07-09 17:54:52,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:52,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92506856] [2021-07-09 17:54:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:54:52,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92506856] [2021-07-09 17:54:52,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92506856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97571798] [2021-07-09 17:54:52,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:54:52,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:54:52,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:52,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:54:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:53,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97571798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:53,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:53,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:54:53,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419029921] [2021-07-09 17:54:53,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:54:53,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:54:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:53,220 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) [2021-07-09 17:54:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:53,801 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-07-09 17:54:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:54:53,801 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 [2021-07-09 17:54:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:53,988 INFO L225 Difference]: With dead ends: 41877 [2021-07-09 17:54:53,988 INFO L226 Difference]: Without dead ends: 41385 [2021-07-09 17:54:53,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:54:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-07-09 17:54:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-07-09 17:54:54,901 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) [2021-07-09 17:54:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-07-09 17:54:55,009 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-07-09 17:54:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:55,009 INFO L482 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-07-09 17:54:55,009 INFO L483 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) [2021-07-09 17:54:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-07-09 17:54:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 17:54:55,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:55,081 INFO L508 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] [2021-07-09 17:54:55,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:54:55,282 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-07-09 17:54:55,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:55,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165305350] [2021-07-09 17:54:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:54:55,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:55,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165305350] [2021-07-09 17:54:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165305350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:55,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791280274] [2021-07-09 17:54:55,316 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 [2021-07-09 17:54:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:54:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:54:55,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791280274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:55,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:55,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:54:55,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518456664] [2021-07-09 17:54:55,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:54:55,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:55,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:54:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:54:55,433 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) [2021-07-09 17:54:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:56,215 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-07-09 17:54:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:54:56,215 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 [2021-07-09 17:54:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:56,656 INFO L225 Difference]: With dead ends: 55329 [2021-07-09 17:54:56,656 INFO L226 Difference]: Without dead ends: 54965 [2021-07-09 17:54:56,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-07-09 17:54:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-07-09 17:54:57,881 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) [2021-07-09 17:54:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-07-09 17:54:58,256 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-07-09 17:54:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:58,256 INFO L482 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-07-09 17:54:58,256 INFO L483 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) [2021-07-09 17:54:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-07-09 17:54:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 17:54:58,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:58,379 INFO L508 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] [2021-07-09 17:54:58,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:58,580 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-07-09 17:54:58,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:58,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762233738] [2021-07-09 17:54:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:54:58,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:58,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762233738] [2021-07-09 17:54:58,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762233738] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:54:58,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:54:58,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:54:58,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92392973] [2021-07-09 17:54:58,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:54:58,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:58,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:54:58,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:54:58,595 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) [2021-07-09 17:54:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:59,056 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-07-09 17:54:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:54:59,056 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 [2021-07-09 17:54:59,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:59,207 INFO L225 Difference]: With dead ends: 36224 [2021-07-09 17:54:59,207 INFO L226 Difference]: Without dead ends: 36156 [2021-07-09 17:54:59,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:54:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-07-09 17:55:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-07-09 17:55:00,166 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) [2021-07-09 17:55:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-07-09 17:55:00,489 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-07-09 17:55:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:00,489 INFO L482 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-07-09 17:55:00,489 INFO L483 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) [2021-07-09 17:55:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-07-09 17:55:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:55:00,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:00,600 INFO L508 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] [2021-07-09 17:55:00,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-07-09 17:55:00,600 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-07-09 17:55:00,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:00,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227343407] [2021-07-09 17:55:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:55:00,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227343407] [2021-07-09 17:55:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227343407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325979395] [2021-07-09 17:55:00,611 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 [2021-07-09 17:55:00,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:55:00,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:55:00,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325979395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:00,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:00,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-07-09 17:55:00,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843351006] [2021-07-09 17:55:00,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:55:00,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:55:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:55:00,740 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) [2021-07-09 17:55:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:01,486 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-07-09 17:55:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:55:01,488 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 [2021-07-09 17:55:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:01,898 INFO L225 Difference]: With dead ends: 51586 [2021-07-09 17:55:01,898 INFO L226 Difference]: Without dead ends: 50003 [2021-07-09 17:55:01,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:55:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-07-09 17:55:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-07-09 17:55:03,101 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) [2021-07-09 17:55:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-07-09 17:55:03,313 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-07-09 17:55:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:03,313 INFO L482 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-07-09 17:55:03,313 INFO L483 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) [2021-07-09 17:55:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-07-09 17:55:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:55:03,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:03,437 INFO L508 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] [2021-07-09 17:55:03,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:55:03,639 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:03,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-07-09 17:55:03,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:03,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020267335] [2021-07-09 17:55:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:03,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:03,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020267335] [2021-07-09 17:55:03,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020267335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:03,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523055155] [2021-07-09 17:55:03,921 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 [2021-07-09 17:55:03,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:55:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523055155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:04,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:04,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:55:04,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683180631] [2021-07-09 17:55:04,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:55:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:55:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:55:04,068 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) [2021-07-09 17:55:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:04,989 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-07-09 17:55:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:55:04,989 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 [2021-07-09 17:55:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:05,345 INFO L225 Difference]: With dead ends: 63166 [2021-07-09 17:55:05,345 INFO L226 Difference]: Without dead ends: 63106 [2021-07-09 17:55:05,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-07-09 17:55:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-07-09 17:55:06,889 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) [2021-07-09 17:55:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-07-09 17:55:07,093 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-07-09 17:55:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:07,093 INFO L482 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-07-09 17:55:07,093 INFO L483 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) [2021-07-09 17:55:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-07-09 17:55:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:07,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:07,214 INFO L508 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] [2021-07-09 17:55:07,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:55:07,431 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-07-09 17:55:07,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:07,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19472103] [2021-07-09 17:55:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:55:07,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:07,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19472103] [2021-07-09 17:55:07,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19472103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:07,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468535164] [2021-07-09 17:55:07,533 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 [2021-07-09 17:55:07,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:55:07,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:55:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:55:07,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468535164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:07,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:07,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:55:07,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893248056] [2021-07-09 17:55:07,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:55:07,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:07,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:55:07,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:55:07,676 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) [2021-07-09 17:55:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:08,392 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-07-09 17:55:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:55:08,392 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 [2021-07-09 17:55:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:08,817 INFO L225 Difference]: With dead ends: 49744 [2021-07-09 17:55:08,817 INFO L226 Difference]: Without dead ends: 49407 [2021-07-09 17:55:08,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:55:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-07-09 17:55:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-07-09 17:55:09,993 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) [2021-07-09 17:55:10,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-07-09 17:55:10,208 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-07-09 17:55:10,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:10,208 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-07-09 17:55:10,208 INFO L483 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) [2021-07-09 17:55:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-07-09 17:55:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:10,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:10,328 INFO L508 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] [2021-07-09 17:55:10,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:55:10,530 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:10,530 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-07-09 17:55:10,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:10,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828197834] [2021-07-09 17:55:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:10,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828197834] [2021-07-09 17:55:10,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828197834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20716748] [2021-07-09 17:55:10,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:55:10,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:55:10,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:55:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:55:10,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20716748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:10,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:10,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-07-09 17:55:10,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586539289] [2021-07-09 17:55:10,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:55:10,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:10,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:55:10,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:55:10,735 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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) [2021-07-09 17:55:11,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:11,549 INFO L93 Difference]: Finished difference Result 60825 states and 280291 transitions. [2021-07-09 17:55:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:55:11,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 [2021-07-09 17:55:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:12,043 INFO L225 Difference]: With dead ends: 60825 [2021-07-09 17:55:12,044 INFO L226 Difference]: Without dead ends: 59259 [2021-07-09 17:55:12,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:55:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-07-09 17:55:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 52848. [2021-07-09 17:55:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52848 states, 52847 states have (on average 4.702499668855375) internal successors, (248513), 52847 states have internal predecessors, (248513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52848 states to 52848 states and 248513 transitions. [2021-07-09 17:55:14,005 INFO L78 Accepts]: Start accepts. Automaton has 52848 states and 248513 transitions. Word has length 41 [2021-07-09 17:55:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:14,005 INFO L482 AbstractCegarLoop]: Abstraction has 52848 states and 248513 transitions. [2021-07-09 17:55:14,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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) [2021-07-09 17:55:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 52848 states and 248513 transitions. [2021-07-09 17:55:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:14,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:14,217 INFO L508 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] [2021-07-09 17:55:14,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:55:14,425 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-07-09 17:55:14,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:14,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871708180] [2021-07-09 17:55:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:14,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:14,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871708180] [2021-07-09 17:55:14,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871708180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:14,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673294176] [2021-07-09 17:55:14,488 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 [2021-07-09 17:55:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:55:14,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673294176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:14,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:14,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:55:14,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910909120] [2021-07-09 17:55:14,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:55:14,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:14,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:55:14,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:55:14,662 INFO L87 Difference]: Start difference. First operand 52848 states and 248513 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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) [2021-07-09 17:55:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:15,544 INFO L93 Difference]: Finished difference Result 64976 states and 299967 transitions. [2021-07-09 17:55:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:55:15,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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 [2021-07-09 17:55:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:15,860 INFO L225 Difference]: With dead ends: 64976 [2021-07-09 17:55:15,860 INFO L226 Difference]: Without dead ends: 64453 [2021-07-09 17:55:15,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:55:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64453 states. [2021-07-09 17:55:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64453 to 58787. [2021-07-09 17:55:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58787 states, 58786 states have (on average 4.700591977681761) internal successors, (276329), 58786 states have internal predecessors, (276329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58787 states to 58787 states and 276329 transitions. [2021-07-09 17:55:17,968 INFO L78 Accepts]: Start accepts. Automaton has 58787 states and 276329 transitions. Word has length 41 [2021-07-09 17:55:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:17,968 INFO L482 AbstractCegarLoop]: Abstraction has 58787 states and 276329 transitions. [2021-07-09 17:55:17,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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) [2021-07-09 17:55:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 58787 states and 276329 transitions. [2021-07-09 17:55:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:18,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:18,131 INFO L508 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] [2021-07-09 17:55:18,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:18,341 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:18,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-07-09 17:55:18,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:18,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130897838] [2021-07-09 17:55:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:18,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130897838] [2021-07-09 17:55:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130897838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784971059] [2021-07-09 17:55:18,719 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 [2021-07-09 17:55:18,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:18,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:55:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:18,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784971059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:18,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:18,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:55:18,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104368086] [2021-07-09 17:55:18,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:55:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:55:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:55:18,880 INFO L87 Difference]: Start difference. First operand 58787 states and 276329 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) [2021-07-09 17:55:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:19,837 INFO L93 Difference]: Finished difference Result 93655 states and 432022 transitions. [2021-07-09 17:55:19,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:55:19,837 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 [2021-07-09 17:55:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:20,314 INFO L225 Difference]: With dead ends: 93655 [2021-07-09 17:55:20,314 INFO L226 Difference]: Without dead ends: 91110 [2021-07-09 17:55:20,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:55:20,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-07-09 17:55:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 76620. [2021-07-09 17:55:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76620 states, 76619 states have (on average 4.695597697699005) internal successors, (359772), 76619 states have internal predecessors, (359772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76620 states to 76620 states and 359772 transitions. [2021-07-09 17:55:24,000 INFO L78 Accepts]: Start accepts. Automaton has 76620 states and 359772 transitions. Word has length 41 [2021-07-09 17:55:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:24,001 INFO L482 AbstractCegarLoop]: Abstraction has 76620 states and 359772 transitions. [2021-07-09 17:55:24,001 INFO L483 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) [2021-07-09 17:55:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 76620 states and 359772 transitions. [2021-07-09 17:55:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:24,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:24,331 INFO L508 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] [2021-07-09 17:55:24,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:24,545 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-07-09 17:55:24,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:24,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084865379] [2021-07-09 17:55:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:24,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084865379] [2021-07-09 17:55:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084865379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895309777] [2021-07-09 17:55:24,642 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 [2021-07-09 17:55:24,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:55:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:55:24,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895309777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:24,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:24,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-09 17:55:24,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019512892] [2021-07-09 17:55:24,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:55:24,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:24,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:55:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:55:24,839 INFO L87 Difference]: Start difference. First operand 76620 states and 359772 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 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) [2021-07-09 17:55:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:26,776 INFO L93 Difference]: Finished difference Result 163014 states and 750713 transitions. [2021-07-09 17:55:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:55:26,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 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 [2021-07-09 17:55:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:27,975 INFO L225 Difference]: With dead ends: 163014 [2021-07-09 17:55:27,975 INFO L226 Difference]: Without dead ends: 159428 [2021-07-09 17:55:27,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:55:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159428 states. [2021-07-09 17:55:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159428 to 126993. [2021-07-09 17:55:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126993 states, 126992 states have (on average 4.747724266095502) internal successors, (602923), 126992 states have internal predecessors, (602923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126993 states to 126993 states and 602923 transitions. [2021-07-09 17:55:34,465 INFO L78 Accepts]: Start accepts. Automaton has 126993 states and 602923 transitions. Word has length 41 [2021-07-09 17:55:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:34,465 INFO L482 AbstractCegarLoop]: Abstraction has 126993 states and 602923 transitions. [2021-07-09 17:55:34,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 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) [2021-07-09 17:55:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 126993 states and 602923 transitions. [2021-07-09 17:55:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:34,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:34,887 INFO L508 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] [2021-07-09 17:55:35,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 17:55:35,087 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-07-09 17:55:35,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:35,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067331653] [2021-07-09 17:55:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:35,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:35,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067331653] [2021-07-09 17:55:35,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067331653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:35,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423291499] [2021-07-09 17:55:35,144 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 [2021-07-09 17:55:35,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:35,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:35,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:55:35,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:35,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423291499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:35,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:35,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:55:35,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236732732] [2021-07-09 17:55:35,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:55:35,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:35,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:55:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:55:35,277 INFO L87 Difference]: Start difference. First operand 126993 states and 602923 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) [2021-07-09 17:55:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:37,056 INFO L93 Difference]: Finished difference Result 156598 states and 736161 transitions. [2021-07-09 17:55:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:55:37,057 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 [2021-07-09 17:55:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:38,312 INFO L225 Difference]: With dead ends: 156598 [2021-07-09 17:55:38,312 INFO L226 Difference]: Without dead ends: 156198 [2021-07-09 17:55:38,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:55:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156198 states. [2021-07-09 17:55:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156198 to 123212. [2021-07-09 17:55:43,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123212 states, 123211 states have (on average 4.758925745266251) internal successors, (586352), 123211 states have internal predecessors, (586352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123212 states to 123212 states and 586352 transitions. [2021-07-09 17:55:44,418 INFO L78 Accepts]: Start accepts. Automaton has 123212 states and 586352 transitions. Word has length 41 [2021-07-09 17:55:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:44,418 INFO L482 AbstractCegarLoop]: Abstraction has 123212 states and 586352 transitions. [2021-07-09 17:55:44,418 INFO L483 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) [2021-07-09 17:55:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 123212 states and 586352 transitions. [2021-07-09 17:55:45,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:45,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:45,187 INFO L508 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] [2021-07-09 17:55:45,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:45,397 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:45,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:45,397 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-07-09 17:55:45,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:45,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823341841] [2021-07-09 17:55:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:45,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:45,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823341841] [2021-07-09 17:55:45,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823341841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:45,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084443343] [2021-07-09 17:55:45,457 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 [2021-07-09 17:55:45,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:55:45,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:45,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:55:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:55:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084443343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:45,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:45,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:55:45,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825275670] [2021-07-09 17:55:45,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:55:45,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:55:45,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:55:45,608 INFO L87 Difference]: Start difference. First operand 123212 states and 586352 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) [2021-07-09 17:55:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:47,681 INFO L93 Difference]: Finished difference Result 166888 states and 780472 transitions. [2021-07-09 17:55:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:55:47,681 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 [2021-07-09 17:55:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:48,993 INFO L225 Difference]: With dead ends: 166888 [2021-07-09 17:55:48,993 INFO L226 Difference]: Without dead ends: 163861 [2021-07-09 17:55:48,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:55:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163861 states. [2021-07-09 17:55:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163861 to 96217. [2021-07-09 17:55:53,448 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) [2021-07-09 17:55:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-07-09 17:55:54,294 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-07-09 17:55:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:54,294 INFO L482 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-07-09 17:55:54,294 INFO L483 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) [2021-07-09 17:55:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-07-09 17:55:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:55:54,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:54,571 INFO L508 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] [2021-07-09 17:55:54,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:55:54,772 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-07-09 17:55:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:54,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629018244] [2021-07-09 17:55:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:55,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:55,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629018244] [2021-07-09 17:55:55,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629018244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:55,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251914079] [2021-07-09 17:55:55,158 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 [2021-07-09 17:55:55,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:55:55,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:55:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:55,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251914079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:55,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:55,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:55:55,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757328674] [2021-07-09 17:55:55,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:55:55,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:55,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:55:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:55:55,309 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) [2021-07-09 17:55:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:56,771 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-07-09 17:55:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:55:56,771 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 [2021-07-09 17:55:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:57,592 INFO L225 Difference]: With dead ends: 118313 [2021-07-09 17:55:57,592 INFO L226 Difference]: Without dead ends: 118079 [2021-07-09 17:55:57,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:55:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-07-09 17:56:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-07-09 17:56:00,709 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) [2021-07-09 17:56:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-07-09 17:56:01,581 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-07-09 17:56:01,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:01,581 INFO L482 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-07-09 17:56:01,581 INFO L483 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) [2021-07-09 17:56:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-07-09 17:56:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:56:01,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:01,907 INFO L508 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] [2021-07-09 17:56:02,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:56:02,108 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-07-09 17:56:02,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:02,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079745491] [2021-07-09 17:56:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:02,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:02,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079745491] [2021-07-09 17:56:02,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079745491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:02,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711588953] [2021-07-09 17:56:02,160 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 [2021-07-09 17:56:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:56:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:02,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711588953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:02,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:02,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:56:02,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398961753] [2021-07-09 17:56:02,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:56:02,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:56:02,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:56:02,337 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) [2021-07-09 17:56:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:03,837 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-07-09 17:56:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:56:03,837 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 [2021-07-09 17:56:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:04,861 INFO L225 Difference]: With dead ends: 131320 [2021-07-09 17:56:04,861 INFO L226 Difference]: Without dead ends: 130644 [2021-07-09 17:56:04,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:56:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-07-09 17:56:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-07-09 17:56:08,290 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) [2021-07-09 17:56:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-07-09 17:56:09,237 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-07-09 17:56:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:09,237 INFO L482 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-07-09 17:56:09,237 INFO L483 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) [2021-07-09 17:56:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-07-09 17:56:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:56:09,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:09,975 INFO L508 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] [2021-07-09 17:56:10,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:56:10,181 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:10,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-07-09 17:56:10,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:10,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122654170] [2021-07-09 17:56:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:10,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:10,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122654170] [2021-07-09 17:56:10,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122654170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:10,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254182032] [2021-07-09 17:56:10,233 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 [2021-07-09 17:56:10,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:10,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:10,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:56:10,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:10,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254182032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:10,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:10,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:56:10,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480129441] [2021-07-09 17:56:10,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:56:10,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:56:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:56:10,390 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) [2021-07-09 17:56:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:12,033 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-07-09 17:56:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:56:12,034 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 [2021-07-09 17:56:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:12,812 INFO L225 Difference]: With dead ends: 140482 [2021-07-09 17:56:12,812 INFO L226 Difference]: Without dead ends: 139756 [2021-07-09 17:56:12,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:56:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-07-09 17:56:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-07-09 17:56:16,608 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) [2021-07-09 17:56:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-07-09 17:56:17,589 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-07-09 17:56:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:17,589 INFO L482 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-07-09 17:56:17,589 INFO L483 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) [2021-07-09 17:56:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-07-09 17:56:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:56:18,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:18,344 INFO L508 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] [2021-07-09 17:56:18,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:56:18,544 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-07-09 17:56:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:18,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364968128] [2021-07-09 17:56:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:18,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:18,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364968128] [2021-07-09 17:56:18,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364968128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:18,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996712954] [2021-07-09 17:56:18,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:56:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:56:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:56:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:56:18,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996712954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:18,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:18,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:56:18,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236035244] [2021-07-09 17:56:18,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:56:18,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:56:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:56:18,774 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 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) [2021-07-09 17:56:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:20,826 INFO L93 Difference]: Finished difference Result 186146 states and 866917 transitions. [2021-07-09 17:56:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:56:20,827 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 [2021-07-09 17:56:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:22,233 INFO L225 Difference]: With dead ends: 186146 [2021-07-09 17:56:22,233 INFO L226 Difference]: Without dead ends: 183395 [2021-07-09 17:56:22,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:56:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183395 states. [2021-07-09 17:56:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183395 to 148831. [2021-07-09 17:56:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148831 states, 148830 states have (on average 4.731868574884096) internal successors, (704244), 148830 states have internal predecessors, (704244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148831 states to 148831 states and 704244 transitions. [2021-07-09 17:56:30,664 INFO L78 Accepts]: Start accepts. Automaton has 148831 states and 704244 transitions. Word has length 41 [2021-07-09 17:56:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:30,664 INFO L482 AbstractCegarLoop]: Abstraction has 148831 states and 704244 transitions. [2021-07-09 17:56:30,664 INFO L483 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) [2021-07-09 17:56:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 148831 states and 704244 transitions. [2021-07-09 17:56:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:56:31,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:31,505 INFO L508 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] [2021-07-09 17:56:31,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:56:31,720 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:31,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:31,721 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-07-09 17:56:31,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:31,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629681501] [2021-07-09 17:56:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:31,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629681501] [2021-07-09 17:56:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629681501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292370069] [2021-07-09 17:56:31,779 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 [2021-07-09 17:56:31,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:31,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:56:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:31,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292370069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:31,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:31,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:56:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412218080] [2021-07-09 17:56:31,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:56:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:31,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:56:31,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:56:31,926 INFO L87 Difference]: Start difference. First operand 148831 states and 704244 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) [2021-07-09 17:56:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:36,289 INFO L93 Difference]: Finished difference Result 327820 states and 1534054 transitions. [2021-07-09 17:56:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:56:36,289 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 [2021-07-09 17:56:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:38,919 INFO L225 Difference]: With dead ends: 327820 [2021-07-09 17:56:38,919 INFO L226 Difference]: Without dead ends: 324633 [2021-07-09 17:56:38,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:56:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324633 states. [2021-07-09 17:56:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324633 to 239665. [2021-07-09 17:56:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239665 states, 239664 states have (on average 4.810242673075639) internal successors, (1152842), 239664 states have internal predecessors, (1152842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239665 states to 239665 states and 1152842 transitions. [2021-07-09 17:56:54,108 INFO L78 Accepts]: Start accepts. Automaton has 239665 states and 1152842 transitions. Word has length 41 [2021-07-09 17:56:54,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:54,108 INFO L482 AbstractCegarLoop]: Abstraction has 239665 states and 1152842 transitions. [2021-07-09 17:56:54,108 INFO L483 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) [2021-07-09 17:56:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 239665 states and 1152842 transitions. [2021-07-09 17:56:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:56:55,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:55,788 INFO L508 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] [2021-07-09 17:56:55,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:55,998 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-07-09 17:56:55,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:55,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438625866] [2021-07-09 17:56:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:56,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:56,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438625866] [2021-07-09 17:56:56,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438625866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:56,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744437266] [2021-07-09 17:56:56,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:56:56,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:56:56,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:56:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:56:56,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744437266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:56,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:56,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:56:56,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483218212] [2021-07-09 17:56:56,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:56:56,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:56,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:56:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:56:56,351 INFO L87 Difference]: Start difference. First operand 239665 states and 1152842 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) [2021-07-09 17:57:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:01,270 INFO L93 Difference]: Finished difference Result 283707 states and 1353356 transitions. [2021-07-09 17:57:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:57:01,271 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 [2021-07-09 17:57:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:03,796 INFO L225 Difference]: With dead ends: 283707 [2021-07-09 17:57:03,796 INFO L226 Difference]: Without dead ends: 283245 [2021-07-09 17:57:03,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:57:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283245 states. [2021-07-09 17:57:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283245 to 208767. [2021-07-09 17:57:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208767 states, 208766 states have (on average 4.808431449565543) internal successors, (1003837), 208766 states have internal predecessors, (1003837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208767 states to 208767 states and 1003837 transitions. [2021-07-09 17:57:15,253 INFO L78 Accepts]: Start accepts. Automaton has 208767 states and 1003837 transitions. Word has length 41 [2021-07-09 17:57:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:15,254 INFO L482 AbstractCegarLoop]: Abstraction has 208767 states and 1003837 transitions. [2021-07-09 17:57:15,254 INFO L483 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) [2021-07-09 17:57:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 208767 states and 1003837 transitions. [2021-07-09 17:57:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:16,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:16,549 INFO L508 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] [2021-07-09 17:57:16,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:57:16,761 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-07-09 17:57:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:16,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121285863] [2021-07-09 17:57:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:16,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:16,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121285863] [2021-07-09 17:57:16,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121285863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832225617] [2021-07-09 17:57:16,864 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 [2021-07-09 17:57:16,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:57:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:16,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:57:16,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:17,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832225617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:17,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:17,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 17:57:17,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38830425] [2021-07-09 17:57:17,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:17,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:17,089 INFO L87 Difference]: Start difference. First operand 208767 states and 1003837 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) [2021-07-09 17:57:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:21,712 INFO L93 Difference]: Finished difference Result 263379 states and 1254429 transitions. [2021-07-09 17:57:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:57:21,715 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 [2021-07-09 17:57:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:24,756 INFO L225 Difference]: With dead ends: 263379 [2021-07-09 17:57:24,756 INFO L226 Difference]: Without dead ends: 260502 [2021-07-09 17:57:24,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260502 states. [2021-07-09 17:57:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260502 to 116427. [2021-07-09 17:57:31,639 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) [2021-07-09 17:57:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-07-09 17:57:32,589 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-07-09 17:57:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:32,589 INFO L482 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-07-09 17:57:32,589 INFO L483 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) [2021-07-09 17:57:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-07-09 17:57:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:32,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:32,951 INFO L508 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] [2021-07-09 17:57:33,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 17:57:33,151 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-07-09 17:57:33,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:33,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116434050] [2021-07-09 17:57:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:33,490 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-09 17:57:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:33,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116434050] [2021-07-09 17:57:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116434050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3539057] [2021-07-09 17:57:33,502 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 [2021-07-09 17:57:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:57:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:33,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3539057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:33,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:33,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-09 17:57:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952530116] [2021-07-09 17:57:33,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:57:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:57:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:57:33,629 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 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) [2021-07-09 17:57:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:36,388 INFO L93 Difference]: Finished difference Result 223049 states and 1035432 transitions. [2021-07-09 17:57:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:57:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 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 [2021-07-09 17:57:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:38,690 INFO L225 Difference]: With dead ends: 223049 [2021-07-09 17:57:38,690 INFO L226 Difference]: Without dead ends: 220377 [2021-07-09 17:57:38,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:57:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220377 states. [2021-07-09 17:57:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220377 to 155837. [2021-07-09 17:57:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155837 states, 155836 states have (on average 4.806129520778254) internal successors, (748968), 155836 states have internal predecessors, (748968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155837 states to 155837 states and 748968 transitions. [2021-07-09 17:57:47,338 INFO L78 Accepts]: Start accepts. Automaton has 155837 states and 748968 transitions. Word has length 41 [2021-07-09 17:57:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:47,338 INFO L482 AbstractCegarLoop]: Abstraction has 155837 states and 748968 transitions. [2021-07-09 17:57:47,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 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) [2021-07-09 17:57:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 155837 states and 748968 transitions. [2021-07-09 17:57:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:48,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:48,114 INFO L508 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] [2021-07-09 17:57:48,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:48,329 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-07-09 17:57:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:48,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391630607] [2021-07-09 17:57:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:48,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:48,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391630607] [2021-07-09 17:57:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391630607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:48,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082860024] [2021-07-09 17:57:48,383 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 [2021-07-09 17:57:48,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:48,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:57:48,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:57:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082860024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:48,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:48,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:57:48,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794750432] [2021-07-09 17:57:48,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:57:48,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:57:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:57:48,525 INFO L87 Difference]: Start difference. First operand 155837 states and 748968 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) [2021-07-09 17:57:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:51,204 INFO L93 Difference]: Finished difference Result 212915 states and 1012751 transitions. [2021-07-09 17:57:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:57:51,205 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 [2021-07-09 17:57:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:52,889 INFO L225 Difference]: With dead ends: 212915 [2021-07-09 17:57:52,889 INFO L226 Difference]: Without dead ends: 210423 [2021-07-09 17:57:52,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:57:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210423 states. [2021-07-09 17:57:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210423 to 174189. [2021-07-09 17:58:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174189 states, 174188 states have (on average 4.835143637908467) internal successors, (842224), 174188 states have internal predecessors, (842224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174189 states to 174189 states and 842224 transitions. [2021-07-09 17:58:01,831 INFO L78 Accepts]: Start accepts. Automaton has 174189 states and 842224 transitions. Word has length 41 [2021-07-09 17:58:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:01,831 INFO L482 AbstractCegarLoop]: Abstraction has 174189 states and 842224 transitions. [2021-07-09 17:58:01,831 INFO L483 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) [2021-07-09 17:58:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 174189 states and 842224 transitions. [2021-07-09 17:58:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:58:02,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:02,698 INFO L508 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] [2021-07-09 17:58:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:58:02,913 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-07-09 17:58:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857959983] [2021-07-09 17:58:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:02,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857959983] [2021-07-09 17:58:02,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857959983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500148526] [2021-07-09 17:58:02,971 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 [2021-07-09 17:58:02,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:58:02,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:58:02,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:03,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500148526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:03,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:03,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:58:03,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86772816] [2021-07-09 17:58:03,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:58:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:58:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:58:03,113 INFO L87 Difference]: Start difference. First operand 174189 states and 842224 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) [2021-07-09 17:58:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:09,066 INFO L93 Difference]: Finished difference Result 397194 states and 1899439 transitions. [2021-07-09 17:58:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:58:09,079 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 [2021-07-09 17:58:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:13,606 INFO L225 Difference]: With dead ends: 397194 [2021-07-09 17:58:13,606 INFO L226 Difference]: Without dead ends: 393877 [2021-07-09 17:58:13,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393877 states. [2021-07-09 17:58:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393877 to 269480. [2021-07-09 17:58:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269480 states, 269479 states have (on average 4.951157604117575) internal successors, (1334233), 269479 states have internal predecessors, (1334233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269480 states to 269480 states and 1334233 transitions. [2021-07-09 17:58:33,542 INFO L78 Accepts]: Start accepts. Automaton has 269480 states and 1334233 transitions. Word has length 41 [2021-07-09 17:58:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:33,543 INFO L482 AbstractCegarLoop]: Abstraction has 269480 states and 1334233 transitions. [2021-07-09 17:58:33,543 INFO L483 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) [2021-07-09 17:58:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 269480 states and 1334233 transitions. [2021-07-09 17:58:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:58:34,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:34,751 INFO L508 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] [2021-07-09 17:58:34,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:34,954 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-07-09 17:58:34,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:34,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261623891] [2021-07-09 17:58:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:35,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:35,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261623891] [2021-07-09 17:58:35,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261623891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:35,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782520197] [2021-07-09 17:58:35,014 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 [2021-07-09 17:58:35,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:58:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:58:35,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782520197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:35,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:35,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 17:58:35,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696134300] [2021-07-09 17:58:35,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:58:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:35,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:58:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:58:35,154 INFO L87 Difference]: Start difference. First operand 269480 states and 1334233 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) [2021-07-09 17:58:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:39,358 INFO L93 Difference]: Finished difference Result 316931 states and 1549745 transitions. [2021-07-09 17:58:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:58:39,359 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 [2021-07-09 17:58:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:43,966 INFO L225 Difference]: With dead ends: 316931 [2021-07-09 17:58:43,967 INFO L226 Difference]: Without dead ends: 316481 [2021-07-09 17:58:43,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:58:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316481 states. [2021-07-09 17:58:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316481 to 205144. [2021-07-09 17:58:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205144 states, 205143 states have (on average 4.904305776945837) internal successors, (1006084), 205143 states have internal predecessors, (1006084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205144 states to 205144 states and 1006084 transitions. [2021-07-09 17:58:56,613 INFO L78 Accepts]: Start accepts. Automaton has 205144 states and 1006084 transitions. Word has length 41 [2021-07-09 17:58:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:56,613 INFO L482 AbstractCegarLoop]: Abstraction has 205144 states and 1006084 transitions. [2021-07-09 17:58:56,613 INFO L483 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) [2021-07-09 17:58:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 205144 states and 1006084 transitions. [2021-07-09 17:58:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:58:57,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:57,612 INFO L508 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] [2021-07-09 17:58:57,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:58:57,828 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-07-09 17:58:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:57,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625995341] [2021-07-09 17:58:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:57,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:57,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625995341] [2021-07-09 17:58:57,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625995341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:57,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295199467] [2021-07-09 17:58:57,896 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 [2021-07-09 17:58:57,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:58:57,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:57,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:58:57,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:58:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295199467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:58,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:58,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 17:58:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768635521] [2021-07-09 17:58:58,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:58:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:58,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:58:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:58:58,043 INFO L87 Difference]: Start difference. First operand 205144 states and 1006084 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) [2021-07-09 17:59:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:02,976 INFO L93 Difference]: Finished difference Result 351280 states and 1697991 transitions. [2021-07-09 17:59:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:59:02,977 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 [2021-07-09 17:59:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:07,464 INFO L225 Difference]: With dead ends: 351280 [2021-07-09 17:59:07,465 INFO L226 Difference]: Without dead ends: 347746 [2021-07-09 17:59:07,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347746 states. [2021-07-09 17:59:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347746 to 266100. [2021-07-09 17:59:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266100 states, 266099 states have (on average 4.991721126347713) internal successors, (1328292), 266099 states have internal predecessors, (1328292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266100 states to 266100 states and 1328292 transitions. [2021-07-09 17:59:25,226 INFO L78 Accepts]: Start accepts. Automaton has 266100 states and 1328292 transitions. Word has length 41 [2021-07-09 17:59:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:25,226 INFO L482 AbstractCegarLoop]: Abstraction has 266100 states and 1328292 transitions. [2021-07-09 17:59:25,227 INFO L483 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) [2021-07-09 17:59:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 266100 states and 1328292 transitions. [2021-07-09 17:59:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 17:59:26,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:26,487 INFO L508 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] [2021-07-09 17:59:26,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:59:26,701 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-07-09 17:59:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:26,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427270454] [2021-07-09 17:59:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:59:26,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:26,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427270454] [2021-07-09 17:59:26,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427270454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:26,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769624533] [2021-07-09 17:59:26,752 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 [2021-07-09 17:59:26,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:59:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:59:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:59:26,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769624533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:26,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:26,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:59:26,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66891144] [2021-07-09 17:59:26,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:59:26,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:26,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:59:26,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:59:26,896 INFO L87 Difference]: Start difference. First operand 266100 states and 1328292 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) [2021-07-09 17:59:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:35,979 INFO L93 Difference]: Finished difference Result 517007 states and 2493362 transitions. [2021-07-09 17:59:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:59:35,988 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 [2021-07-09 17:59:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:41,295 INFO L225 Difference]: With dead ends: 517007 [2021-07-09 17:59:41,296 INFO L226 Difference]: Without dead ends: 515961 [2021-07-09 17:59:41,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:59:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515961 states. [2021-07-09 17:59:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515961 to 210221. [2021-07-09 17:59:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210221 states, 210220 states have (on average 4.792717153458282) internal successors, (1007525), 210220 states have internal predecessors, (1007525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210221 states to 210221 states and 1007525 transitions. [2021-07-09 17:59:56,906 INFO L78 Accepts]: Start accepts. Automaton has 210221 states and 1007525 transitions. Word has length 43 [2021-07-09 17:59:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:56,906 INFO L482 AbstractCegarLoop]: Abstraction has 210221 states and 1007525 transitions. [2021-07-09 17:59:56,906 INFO L483 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) [2021-07-09 17:59:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 210221 states and 1007525 transitions. [2021-07-09 17:59:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 17:59:58,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:58,156 INFO L508 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] [2021-07-09 17:59:58,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:59:58,375 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-07-09 17:59:58,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:58,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894416131] [2021-07-09 17:59:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:59:58,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:58,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894416131] [2021-07-09 17:59:58,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894416131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:58,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161731206] [2021-07-09 17:59:58,440 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 [2021-07-09 17:59:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:58,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:59:58,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:59:58,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161731206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:58,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:58,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:59:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757336954] [2021-07-09 17:59:58,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:59:58,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:59:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:59:58,630 INFO L87 Difference]: Start difference. First operand 210221 states and 1007525 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) [2021-07-09 18:00:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:07,028 INFO L93 Difference]: Finished difference Result 490894 states and 2284771 transitions. [2021-07-09 18:00:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:00:07,029 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 [2021-07-09 18:00:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:11,779 INFO L225 Difference]: With dead ends: 490894 [2021-07-09 18:00:11,779 INFO L226 Difference]: Without dead ends: 487402 [2021-07-09 18:00:11,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:00:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487402 states. [2021-07-09 18:00:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487402 to 245403. [2021-07-09 18:00:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245403 states, 245402 states have (on average 4.805160512139265) internal successors, (1179196), 245402 states have internal predecessors, (1179196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245403 states to 245403 states and 1179196 transitions. [2021-07-09 18:00:33,710 INFO L78 Accepts]: Start accepts. Automaton has 245403 states and 1179196 transitions. Word has length 43 [2021-07-09 18:00:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:33,711 INFO L482 AbstractCegarLoop]: Abstraction has 245403 states and 1179196 transitions. [2021-07-09 18:00:33,711 INFO L483 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) [2021-07-09 18:00:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 245403 states and 1179196 transitions. [2021-07-09 18:00:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:00:34,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:34,969 INFO L508 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] [2021-07-09 18:00:35,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:00:35,173 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-07-09 18:00:35,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:35,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765722684] [2021-07-09 18:00:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:00:35,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765722684] [2021-07-09 18:00:35,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765722684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:35,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020128333] [2021-07-09 18:00:35,262 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 [2021-07-09 18:00:35,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:35,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:00:35,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:35,624 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 18:00:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:00:35,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020128333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:35,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:35,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 18:00:35,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363651337] [2021-07-09 18:00:35,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:00:35,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:00:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:00:35,737 INFO L87 Difference]: Start difference. First operand 245403 states and 1179196 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) [2021-07-09 18:00:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:43,183 INFO L93 Difference]: Finished difference Result 401083 states and 1918180 transitions. [2021-07-09 18:00:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:00:43,183 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 [2021-07-09 18:00:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:47,460 INFO L225 Difference]: With dead ends: 401083 [2021-07-09 18:00:47,461 INFO L226 Difference]: Without dead ends: 400185 [2021-07-09 18:00:47,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:00:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400185 states. [2021-07-09 18:00:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400185 to 102134. [2021-07-09 18:00:57,358 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) [2021-07-09 18:00:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-07-09 18:00:58,245 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-07-09 18:00:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:58,245 INFO L482 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-07-09 18:00:58,246 INFO L483 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) [2021-07-09 18:00:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-07-09 18:00:58,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:00:58,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:58,592 INFO L508 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] [2021-07-09 18:00:58,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:58,799 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-07-09 18:00:58,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:58,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516311399] [2021-07-09 18:00:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:00:58,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:58,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516311399] [2021-07-09 18:00:58,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516311399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:58,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38293942] [2021-07-09 18:00:58,851 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 [2021-07-09 18:00:58,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:58,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:00:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:00:58,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38293942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:58,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:58,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 18:00:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462364473] [2021-07-09 18:00:58,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:00:58,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:00:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:00:58,999 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) [2021-07-09 18:00:59,432 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-09 18:01:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:04,691 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-07-09 18:01:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:01:04,693 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 [2021-07-09 18:01:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:07,709 INFO L225 Difference]: With dead ends: 359669 [2021-07-09 18:01:07,710 INFO L226 Difference]: Without dead ends: 358139 [2021-07-09 18:01:07,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:01:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-07-09 18:01:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-07-09 18:01:18,537 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) [2021-07-09 18:01:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-07-09 18:01:19,717 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-07-09 18:01:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:19,717 INFO L482 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-07-09 18:01:19,717 INFO L483 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) [2021-07-09 18:01:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-07-09 18:01:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:01:20,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:20,542 INFO L508 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] [2021-07-09 18:01:20,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:01:20,753 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-07-09 18:01:20,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:20,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803518477] [2021-07-09 18:01:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:01:20,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:20,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803518477] [2021-07-09 18:01:20,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803518477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337345932] [2021-07-09 18:01:20,805 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) [2021-07-09 18:01:20,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:20,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:01:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:01:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337345932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:20,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 18:01:20,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684993183] [2021-07-09 18:01:20,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:01:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:01:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:01:20,947 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) [2021-07-09 18:01:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:25,286 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-07-09 18:01:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:01:25,286 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 [2021-07-09 18:01:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:28,313 INFO L225 Difference]: With dead ends: 318028 [2021-07-09 18:01:28,313 INFO L226 Difference]: Without dead ends: 317616 [2021-07-09 18:01:28,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:01:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-07-09 18:01:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-07-09 18:01:36,827 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) [2021-07-09 18:01:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-07-09 18:01:38,179 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-07-09 18:01:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:38,180 INFO L482 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-07-09 18:01:38,180 INFO L483 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) [2021-07-09 18:01:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-07-09 18:01:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:01:39,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:39,491 INFO L508 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] [2021-07-09 18:01:39,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:39,706 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:39,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:39,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-07-09 18:01:39,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:39,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713666566] [2021-07-09 18:01:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:01:39,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713666566] [2021-07-09 18:01:39,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713666566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132079364] [2021-07-09 18:01:39,777 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 [2021-07-09 18:01:39,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:01:39,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:01:39,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:01:40,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132079364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:40,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:01:40,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269225506] [2021-07-09 18:01:40,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:01:40,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:01:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:01:40,036 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) [2021-07-09 18:01:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:49,751 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-07-09 18:01:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:01:49,757 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 [2021-07-09 18:01:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:55,488 INFO L225 Difference]: With dead ends: 593260 [2021-07-09 18:01:55,488 INFO L226 Difference]: Without dead ends: 584415 [2021-07-09 18:01:55,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:01:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-07-09 18:02:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-07-09 18:02:11,391 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) [2021-07-09 18:02:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-07-09 18:02:13,315 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-07-09 18:02:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:13,315 INFO L482 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-07-09 18:02:13,315 INFO L483 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) [2021-07-09 18:02:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-07-09 18:02:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:02:14,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:14,477 INFO L508 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] [2021-07-09 18:02:14,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:14,693 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-07-09 18:02:14,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:14,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871421639] [2021-07-09 18:02:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:02:14,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:14,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871421639] [2021-07-09 18:02:14,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871421639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244788325] [2021-07-09 18:02:14,724 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 [2021-07-09 18:02:14,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:14,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:02:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:02:15,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244788325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:15,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:15,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-07-09 18:02:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375726718] [2021-07-09 18:02:15,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:02:15,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:02:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:02:15,167 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) [2021-07-09 18:02:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:25,112 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-07-09 18:02:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:02:25,113 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 [2021-07-09 18:02:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:31,945 INFO L225 Difference]: With dead ends: 489163 [2021-07-09 18:02:31,945 INFO L226 Difference]: Without dead ends: 486417 [2021-07-09 18:02:31,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 1507.7ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 18:02:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-07-09 18:02:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-07-09 18:02:46,110 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) [2021-07-09 18:02:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-07-09 18:02:48,230 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-07-09 18:02:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:48,230 INFO L482 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-07-09 18:02:48,230 INFO L483 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) [2021-07-09 18:02:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-07-09 18:02:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:02:49,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:49,359 INFO L508 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] [2021-07-09 18:02:49,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:02:49,559 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-07-09 18:02:49,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:49,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148179199] [2021-07-09 18:02:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 18:02:49,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148179199] [2021-07-09 18:02:49,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148179199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867971875] [2021-07-09 18:02:49,609 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 [2021-07-09 18:02:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:02:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:02:49,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867971875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:49,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:49,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 18:02:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062399147] [2021-07-09 18:02:49,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:02:49,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:49,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:02:49,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:49,767 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) [2021-07-09 18:02:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:55,319 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-07-09 18:02:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:02:55,320 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 [2021-07-09 18:02:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:59,066 INFO L225 Difference]: With dead ends: 345677 [2021-07-09 18:02:59,067 INFO L226 Difference]: Without dead ends: 344598 [2021-07-09 18:02:59,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:02:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-07-09 18:03:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-07-09 18:03:09,697 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) [2021-07-09 18:03:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-07-09 18:03:11,497 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-07-09 18:03:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:11,497 INFO L482 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-07-09 18:03:11,497 INFO L483 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) [2021-07-09 18:03:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-07-09 18:03:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:03:12,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:12,416 INFO L508 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] [2021-07-09 18:03:12,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:12,633 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-07-09 18:03:12,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:12,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798005538] [2021-07-09 18:03:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:03:12,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798005538] [2021-07-09 18:03:12,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798005538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:12,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362646328] [2021-07-09 18:03:12,669 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 [2021-07-09 18:03:12,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:12,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:03:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 18:03:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362646328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:12,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:12,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 18:03:12,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433953831] [2021-07-09 18:03:12,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:03:12,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:03:12,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:03:12,816 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) [2021-07-09 18:03:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:17,730 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-07-09 18:03:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:03:17,730 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 [2021-07-09 18:03:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:21,646 INFO L225 Difference]: With dead ends: 362878 [2021-07-09 18:03:21,646 INFO L226 Difference]: Without dead ends: 361792 [2021-07-09 18:03:21,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:03:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-07-09 18:03:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-07-09 18:03:34,360 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) [2021-07-09 18:03:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-07-09 18:03:37,037 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-07-09 18:03:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:37,038 INFO L482 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-07-09 18:03:37,038 INFO L483 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) [2021-07-09 18:03:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-07-09 18:03:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:03:38,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:38,223 INFO L508 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] [2021-07-09 18:03:38,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:03:38,424 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-07-09 18:03:38,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:38,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283393986] [2021-07-09 18:03:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 18:03:38,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283393986] [2021-07-09 18:03:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283393986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:38,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723052268] [2021-07-09 18:03:38,478 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 [2021-07-09 18:03:38,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:03:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:03:38,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:03:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723052268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:38,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:38,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:03:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247286832] [2021-07-09 18:03:38,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:03:38,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:03:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:03:38,639 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) [2021-07-09 18:03:39,469 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-07-09 18:03:41,673 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-07-09 18:03:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:49,455 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-07-09 18:03:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:03:49,456 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 [2021-07-09 18:03:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-07-09 18:03:55,725 INFO L225 Difference]: With dead ends: 557436 [2021-07-09 18:03:55,725 INFO L226 Difference]: Without dead ends: 555086 [2021-07-09 18:03:55,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1741.3ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-07-09 18:03:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-07-09 18:03:57,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:57,217 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:03:57,219 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:03:57,220 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:03:57,220 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:03:57 BasicIcfg [2021-07-09 18:03:57,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:03:57,220 INFO L168 Benchmark]: Toolchain (without parser) took 560612.10 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 182.9 MB in the beginning and 5.1 GB in the end (delta: -4.9 GB). Peak memory consumption was 4.4 GB. Max. memory is 8.0 GB. [2021-07-09 18:03:57,220 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 184.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:03:57,220 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.27 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:03:57,221 INFO L168 Benchmark]: Boogie Preprocessor took 11.42 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 180.4 MB in the end (delta: 941.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:03:57,221 INFO L168 Benchmark]: RCFGBuilder took 217.94 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 165.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:03:57,221 INFO L168 Benchmark]: TraceAbstraction took 560360.41 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 165.3 MB in the beginning and 5.1 GB in the end (delta: -4.9 GB). Peak memory consumption was 4.4 GB. Max. memory is 8.0 GB. [2021-07-09 18:03:57,221 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 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 184.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.27 ms. Allocated memory is still 202.4 MB. Free memory was 182.8 MB in the beginning and 181.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.42 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 180.4 MB in the end (delta: 941.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 217.94 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 165.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 560360.41 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 165.3 MB in the beginning and 5.1 GB in the end (delta: -4.9 GB). Peak memory consumption was 4.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 560281.7ms, OverallIterations: 56, TraceHistogramMax: 3, EmptinessCheckTime: 23602.3ms, AutomataDifference: 218817.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4333 SDtfs, 18179 SDslu, 27875 SDs, 0 SdLazy, 13488 SolverSat, 2122 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6298.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2955 GetRequests, 1681 SyntacticMatches, 5 SemanticMatches, 1269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16580 ImplicationChecksByTransitivity, 12841.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269480occurred in iteration=44, InterpolantAutomatonStates: 1028, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 295539.1ms AutomataMinimizationTime, 56 MinimizatonAttempts, 3217869 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 231.1ms SsaConstructionTime, 844.7ms SatisfiabilityAnalysisTime, 9644.3ms InterpolantComputationTime, 3939 NumberOfCodeBlocks, 3925 NumberOfCodeBlocksAsserted, 169 NumberOfCheckSat, 3836 ConstructedInterpolants, 0 QuantifiedInterpolants, 22373 SizeOfPredicates, 134 NumberOfNonLiveVariables, 4888 ConjunctsInSsa, 593 ConjunctsInUnsatCore, 103 InterpolantComputations, 10 PerfectInterpolantSequences, 559/1346 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