/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/min-max.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:47:15,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:47:15,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:47:15,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:47:15,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 18:47:15,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:47:15,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:47:15,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:47:15,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:47:15,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:47:15,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:47:15,539 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:47:15,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:47:15,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:47:15,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:47:15,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:47:15,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:47:15,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:47:15,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:47:15,542 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:47:15,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:47:15,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:47:15,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:47:15,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:47:15,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:47:15,826 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:47:15,827 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:47:15,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/min-max.wvr.bpl [2021-02-19 18:47:15,833 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/min-max.wvr.bpl' [2021-02-19 18:47:15,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:47:15,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:47:15,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:47:15,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:47:15,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:47:15,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:47:15,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:47:15,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:47:15,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:47:15,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... [2021-02-19 18:47:15,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:47:15,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:47:15,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:47:15,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:47:15,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:47:15,959 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:47:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:47:15,960 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:47:15,961 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:47:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:47:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:47:15,961 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:47:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:47:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:47:15,961 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:47:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:47:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:47:15,963 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 18:47:15,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 18:47:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 18:47:15,963 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-02-19 18:47:15,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-02-19 18:47:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-02-19 18:47:15,964 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:47:16,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:47:16,125 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:47:16,126 INFO L202 PluginConnector]: Adding new model min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:47:16 BoogieIcfgContainer [2021-02-19 18:47:16,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:47:16,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:47:16,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:47:16,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:47:16,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:47:15" (1/2) ... [2021-02-19 18:47:16,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1800a092 and model type min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:47:16, skipping insertion in model container [2021-02-19 18:47:16,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:47:16" (2/2) ... [2021-02-19 18:47:16,147 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max.wvr.bpl [2021-02-19 18:47:16,152 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:47:16,152 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:47:16,155 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:47:16,156 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:47:16,268 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-02-19 18:47:16,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-02-19 18:47:16,311 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:47:16,312 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:47:16,312 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:47:16,312 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:47:16,312 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:47:16,312 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:47:16,312 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:47:16,312 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:47:16,326 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-02-19 18:47:16,717 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:47:16,795 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:16,796 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:16,797 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -84011710, now seen corresponding path program 1 times [2021-02-19 18:47:16,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:16,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923756787] [2021-02-19 18:47:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:16,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923756787] [2021-02-19 18:47:16,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:16,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:47:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138819723] [2021-02-19 18:47:16,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:47:16,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:16,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:47:16,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:17,018 INFO L87 Difference]: Start difference. First operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:17,481 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-02-19 18:47:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:47:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:47:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:17,706 INFO L225 Difference]: With dead ends: 23171 [2021-02-19 18:47:17,706 INFO L226 Difference]: Without dead ends: 15763 [2021-02-19 18:47:17,708 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:47:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-02-19 18:47:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-02-19 18:47:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-02-19 18:47:18,431 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-02-19 18:47:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:18,431 INFO L480 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-02-19 18:47:18,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-02-19 18:47:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:47:18,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:18,460 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:18,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:47:18,461 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:18,464 INFO L82 PathProgramCache]: Analyzing trace with hash -547772732, now seen corresponding path program 2 times [2021-02-19 18:47:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:18,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483615153] [2021-02-19 18:47:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:18,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483615153] [2021-02-19 18:47:18,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:18,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:47:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471604084] [2021-02-19 18:47:18,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:18,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:18,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:18,513 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:18,707 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-02-19 18:47:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:47:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:18,765 INFO L225 Difference]: With dead ends: 9446 [2021-02-19 18:47:18,765 INFO L226 Difference]: Without dead ends: 6583 [2021-02-19 18:47:18,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-02-19 18:47:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-02-19 18:47:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-02-19 18:47:19,018 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-02-19 18:47:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:19,018 INFO L480 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-02-19 18:47:19,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-02-19 18:47:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:47:19,114 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:19,114 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:19,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:47:19,114 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash -855124606, now seen corresponding path program 3 times [2021-02-19 18:47:19,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:19,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067865562] [2021-02-19 18:47:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:19,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067865562] [2021-02-19 18:47:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:47:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383413602] [2021-02-19 18:47:19,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:47:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:47:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:19,164 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:19,517 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-02-19 18:47:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:47:19,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:47:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:19,602 INFO L225 Difference]: With dead ends: 22801 [2021-02-19 18:47:19,604 INFO L226 Difference]: Without dead ends: 16593 [2021-02-19 18:47:19,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:47:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-02-19 18:47:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-02-19 18:47:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-02-19 18:47:20,020 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-02-19 18:47:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:20,020 INFO L480 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-02-19 18:47:20,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-02-19 18:47:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:47:20,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:20,042 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:20,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:47:20,042 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 996653864, now seen corresponding path program 4 times [2021-02-19 18:47:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:20,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667517126] [2021-02-19 18:47:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:20,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667517126] [2021-02-19 18:47:20,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:20,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:47:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174558873] [2021-02-19 18:47:20,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:20,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:20,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:20,076 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:20,238 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2021-02-19 18:47:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:20,284 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-02-19 18:47:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:47:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:20,310 INFO L225 Difference]: With dead ends: 8424 [2021-02-19 18:47:20,310 INFO L226 Difference]: Without dead ends: 6361 [2021-02-19 18:47:20,311 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-02-19 18:47:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-02-19 18:47:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-02-19 18:47:20,580 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-02-19 18:47:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:20,580 INFO L480 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-02-19 18:47:20,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-02-19 18:47:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:20,605 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:20,605 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:20,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:47:20,606 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash 469464166, now seen corresponding path program 1 times [2021-02-19 18:47:20,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:20,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219097158] [2021-02-19 18:47:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:20,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219097158] [2021-02-19 18:47:20,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794900952] [2021-02-19 18:47:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:47:20,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:20,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:20,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 18:47:20,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286207605] [2021-02-19 18:47:20,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:47:20,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:20,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:47:20,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:47:20,886 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:21,050 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-02-19 18:47:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:47:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:21,170 INFO L225 Difference]: With dead ends: 13742 [2021-02-19 18:47:21,170 INFO L226 Difference]: Without dead ends: 13742 [2021-02-19 18:47:21,171 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:47:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-02-19 18:47:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-02-19 18:47:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-02-19 18:47:21,582 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-02-19 18:47:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:21,582 INFO L480 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-02-19 18:47:21,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-02-19 18:47:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:21,619 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:21,619 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:21,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:21,834 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1452764259, now seen corresponding path program 1 times [2021-02-19 18:47:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:21,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386632802] [2021-02-19 18:47:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386632802] [2021-02-19 18:47:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220710163] [2021-02-19 18:47:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:47:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:22,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 18:47:22,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-02-19 18:47:22,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459636938] [2021-02-19 18:47:22,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:22,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:47:22,054 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:22,183 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-02-19 18:47:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:22,230 INFO L225 Difference]: With dead ends: 11412 [2021-02-19 18:47:22,230 INFO L226 Difference]: Without dead ends: 11118 [2021-02-19 18:47:22,231 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-02-19 18:47:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-02-19 18:47:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-02-19 18:47:22,579 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-02-19 18:47:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:22,580 INFO L480 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-02-19 18:47:22,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-02-19 18:47:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:22,602 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:22,602 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:22,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:22,818 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:22,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2092470021, now seen corresponding path program 1 times [2021-02-19 18:47:22,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:22,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126127017] [2021-02-19 18:47:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:22,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126127017] [2021-02-19 18:47:22,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:22,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:47:22,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976913172] [2021-02-19 18:47:22,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:22,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:22,863 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:22,996 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-02-19 18:47:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:23,053 INFO L225 Difference]: With dead ends: 15516 [2021-02-19 18:47:23,054 INFO L226 Difference]: Without dead ends: 15386 [2021-02-19 18:47:23,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-02-19 18:47:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-02-19 18:47:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-02-19 18:47:23,565 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-02-19 18:47:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:23,566 INFO L480 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-02-19 18:47:23,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-02-19 18:47:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:23,595 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:23,595 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:23,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:47:23,596 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:23,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1121887134, now seen corresponding path program 1 times [2021-02-19 18:47:23,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:23,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380372554] [2021-02-19 18:47:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:23,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380372554] [2021-02-19 18:47:23,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:23,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:47:23,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308342456] [2021-02-19 18:47:23,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:23,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:23,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:23,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:23,614 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:23,779 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-02-19 18:47:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:23,852 INFO L225 Difference]: With dead ends: 22857 [2021-02-19 18:47:23,852 INFO L226 Difference]: Without dead ends: 22667 [2021-02-19 18:47:23,852 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-02-19 18:47:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-02-19 18:47:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:24,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-02-19 18:47:24,561 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-02-19 18:47:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:24,561 INFO L480 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-02-19 18:47:24,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-02-19 18:47:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:24,603 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:24,603 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:24,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:47:24,604 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash -441360931, now seen corresponding path program 2 times [2021-02-19 18:47:24,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:24,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287671667] [2021-02-19 18:47:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:24,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287671667] [2021-02-19 18:47:24,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475831609] [2021-02-19 18:47:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:24,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:47:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:47:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:24,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:24,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-02-19 18:47:24,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282863571] [2021-02-19 18:47:24,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:47:24,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:47:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:47:24,755 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:25,966 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-02-19 18:47:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:47:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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 30 [2021-02-19 18:47:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:26,177 INFO L225 Difference]: With dead ends: 64631 [2021-02-19 18:47:26,177 INFO L226 Difference]: Without dead ends: 50671 [2021-02-19 18:47:26,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:47:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-02-19 18:47:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-02-19 18:47:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-02-19 18:47:27,302 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-02-19 18:47:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:27,302 INFO L480 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-02-19 18:47:27,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-02-19 18:47:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:27,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:27,350 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:27,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:27,565 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1216748286, now seen corresponding path program 2 times [2021-02-19 18:47:27,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:27,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458021976] [2021-02-19 18:47:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:27,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458021976] [2021-02-19 18:47:27,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:27,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:47:27,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81968643] [2021-02-19 18:47:27,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:27,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:27,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:27,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:27,596 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:28,066 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-02-19 18:47:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:28,167 INFO L225 Difference]: With dead ends: 27166 [2021-02-19 18:47:28,168 INFO L226 Difference]: Without dead ends: 26834 [2021-02-19 18:47:28,168 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-02-19 18:47:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-02-19 18:47:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-02-19 18:47:29,048 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-02-19 18:47:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:29,048 INFO L480 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-02-19 18:47:29,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-02-19 18:47:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:29,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:29,124 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:29,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:47:29,125 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1338072029, now seen corresponding path program 2 times [2021-02-19 18:47:29,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:29,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641340058] [2021-02-19 18:47:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:29,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641340058] [2021-02-19 18:47:29,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:29,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:47:29,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287770988] [2021-02-19 18:47:29,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:29,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:29,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:29,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:29,160 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:29,309 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-02-19 18:47:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:47:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:29,377 INFO L225 Difference]: With dead ends: 24325 [2021-02-19 18:47:29,378 INFO L226 Difference]: Without dead ends: 24325 [2021-02-19 18:47:29,378 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-02-19 18:47:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-02-19 18:47:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-02-19 18:47:30,218 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-02-19 18:47:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:30,218 INFO L480 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-02-19 18:47:30,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-02-19 18:47:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:30,271 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:30,271 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:30,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 18:47:30,272 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:30,272 INFO L82 PathProgramCache]: Analyzing trace with hash -513263611, now seen corresponding path program 3 times [2021-02-19 18:47:30,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:30,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881966987] [2021-02-19 18:47:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:30,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881966987] [2021-02-19 18:47:30,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536227501] [2021-02-19 18:47:30,331 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:30,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:47:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:30,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 18:47:30,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:30,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:30,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-02-19 18:47:30,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600102433] [2021-02-19 18:47:30,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:47:30,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:47:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:47:30,440 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:31,599 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-02-19 18:47:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:47:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 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 30 [2021-02-19 18:47:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:32,031 INFO L225 Difference]: With dead ends: 67384 [2021-02-19 18:47:32,031 INFO L226 Difference]: Without dead ends: 35063 [2021-02-19 18:47:32,032 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:47:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-02-19 18:47:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-02-19 18:47:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19352 states, 19351 states have (on average 4.504315022479458) internal successors, (87163), 19351 states have internal predecessors, (87163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-02-19 18:47:32,676 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-02-19 18:47:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:32,676 INFO L480 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-02-19 18:47:32,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-02-19 18:47:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:32,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:32,722 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:32,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:32,925 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:32,926 INFO L82 PathProgramCache]: Analyzing trace with hash -349937079, now seen corresponding path program 3 times [2021-02-19 18:47:32,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:32,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3513796] [2021-02-19 18:47:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:32,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3513796] [2021-02-19 18:47:32,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:32,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:47:32,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106027809] [2021-02-19 18:47:32,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:32,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:47:32,965 INFO L87 Difference]: Start difference. First operand 19352 states and 87163 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:33,114 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-02-19 18:47:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:33,395 INFO L225 Difference]: With dead ends: 20461 [2021-02-19 18:47:33,396 INFO L226 Difference]: Without dead ends: 19957 [2021-02-19 18:47:33,396 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-02-19 18:47:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-02-19 18:47:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 4.485086602844336) internal successors, (81050), 18071 states have internal predecessors, (81050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-02-19 18:47:33,800 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-02-19 18:47:33,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:33,801 INFO L480 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-02-19 18:47:33,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-02-19 18:47:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:33,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:33,842 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:33,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 18:47:33,842 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1454448290, now seen corresponding path program 2 times [2021-02-19 18:47:33,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:33,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253667451] [2021-02-19 18:47:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:33,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253667451] [2021-02-19 18:47:33,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:47:33,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:47:33,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362208432] [2021-02-19 18:47:33,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:47:33,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:47:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:47:33,871 INFO L87 Difference]: Start difference. First operand 18072 states and 81050 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:34,051 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-02-19 18:47:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:47:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:34,117 INFO L225 Difference]: With dead ends: 21232 [2021-02-19 18:47:34,117 INFO L226 Difference]: Without dead ends: 20403 [2021-02-19 18:47:34,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:47:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-02-19 18:47:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-02-19 18:47:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18470 states, 18469 states have (on average 4.4772321186853645) internal successors, (82690), 18469 states have internal predecessors, (82690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-02-19 18:47:34,784 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-02-19 18:47:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:34,784 INFO L480 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-02-19 18:47:34,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-02-19 18:47:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:47:34,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:34,825 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:34,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-19 18:47:34,825 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:34,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1560801958, now seen corresponding path program 3 times [2021-02-19 18:47:34,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:34,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213686110] [2021-02-19 18:47:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:34,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213686110] [2021-02-19 18:47:34,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168261126] [2021-02-19 18:47:34,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:34,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:47:34,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:47:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:34,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 18:47:34,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-02-19 18:47:34,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424471250] [2021-02-19 18:47:34,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:47:34,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:47:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:47:34,967 INFO L87 Difference]: Start difference. First operand 18470 states and 82690 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:35,100 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-02-19 18:47:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:47:35,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 18:47:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:35,150 INFO L225 Difference]: With dead ends: 19318 [2021-02-19 18:47:35,150 INFO L226 Difference]: Without dead ends: 18640 [2021-02-19 18:47:35,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-02-19 18:47:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-02-19 18:47:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13099 states, 13098 states have (on average 4.455183997556879) internal successors, (58354), 13098 states have internal predecessors, (58354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-02-19 18:47:35,710 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-02-19 18:47:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:35,710 INFO L480 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-02-19 18:47:35,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-02-19 18:47:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:47:35,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:35,740 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:35,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:47:35,941 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1945235696, now seen corresponding path program 1 times [2021-02-19 18:47:35,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:35,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850454913] [2021-02-19 18:47:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:47:36,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850454913] [2021-02-19 18:47:36,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627853772] [2021-02-19 18:47:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:47:36,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:36,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:36,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-02-19 18:47:36,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220042708] [2021-02-19 18:47:36,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:47:36,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:47:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:36,119 INFO L87 Difference]: Start difference. First operand 13099 states and 58354 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:36,931 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-02-19 18:47:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:47:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:47:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:37,024 INFO L225 Difference]: With dead ends: 43919 [2021-02-19 18:47:37,024 INFO L226 Difference]: Without dead ends: 24373 [2021-02-19 18:47:37,025 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:47:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-02-19 18:47:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-02-19 18:47:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 4.517816028944194) internal successors, (41207), 9121 states have internal predecessors, (41207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-02-19 18:47:37,711 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-02-19 18:47:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:37,711 INFO L480 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-02-19 18:47:37,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-02-19 18:47:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 18:47:37,747 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:37,747 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:37,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:37,948 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:37,948 INFO L82 PathProgramCache]: Analyzing trace with hash 730836858, now seen corresponding path program 1 times [2021-02-19 18:47:37,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:37,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687917637] [2021-02-19 18:47:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:47:38,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687917637] [2021-02-19 18:47:38,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716780692] [2021-02-19 18:47:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 18:47:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:38,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:38,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-02-19 18:47:38,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583193042] [2021-02-19 18:47:38,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:47:38,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:47:38,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:38,131 INFO L87 Difference]: Start difference. First operand 9122 states and 41207 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:39,298 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-02-19 18:47:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:47:39,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 18:47:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:39,378 INFO L225 Difference]: With dead ends: 33369 [2021-02-19 18:47:39,378 INFO L226 Difference]: Without dead ends: 23102 [2021-02-19 18:47:39,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:47:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-02-19 18:47:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-02-19 18:47:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9972 states, 9971 states have (on average 4.515595226155852) internal successors, (45025), 9971 states have internal predecessors, (45025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-02-19 18:47:39,888 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-02-19 18:47:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:39,888 INFO L480 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-02-19 18:47:39,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-02-19 18:47:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:47:39,909 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:39,909 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:40,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:47:40,110 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:40,110 INFO L82 PathProgramCache]: Analyzing trace with hash 479254064, now seen corresponding path program 1 times [2021-02-19 18:47:40,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:40,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031122827] [2021-02-19 18:47:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031122827] [2021-02-19 18:47:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494433272] [2021-02-19 18:47:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:40,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:47:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:40,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-02-19 18:47:40,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:40,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:40,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:40,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-02-19 18:47:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 18:47:40,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:40,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:40,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:40,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 18:47:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:40,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:40,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-02-19 18:47:40,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534534345] [2021-02-19 18:47:40,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:47:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:47:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:40,357 INFO L87 Difference]: Start difference. First operand 9972 states and 45025 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:40,736 INFO L93 Difference]: Finished difference Result 34243 states and 157744 transitions. [2021-02-19 18:47:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:47:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:47:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:40,817 INFO L225 Difference]: With dead ends: 34243 [2021-02-19 18:47:40,817 INFO L226 Difference]: Without dead ends: 24028 [2021-02-19 18:47:40,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:47:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24028 states. [2021-02-19 18:47:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24028 to 9804. [2021-02-19 18:47:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9804 states, 9803 states have (on average 4.534428236254208) internal successors, (44451), 9803 states have internal predecessors, (44451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-02-19 18:47:41,153 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-02-19 18:47:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:41,154 INFO L480 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-02-19 18:47:41,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-02-19 18:47:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:47:41,175 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:41,175 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:41,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:47:41,376 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1507071856, now seen corresponding path program 2 times [2021-02-19 18:47:41,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:41,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229315486] [2021-02-19 18:47:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:41,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229315486] [2021-02-19 18:47:41,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135744509] [2021-02-19 18:47:41,599 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:41,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:47:41,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:41,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 18:47:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:41,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:47:41,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:41,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:41,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:41,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 18:47:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:41,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:41,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 18:47:41,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612989942] [2021-02-19 18:47:41,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:47:41,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:41,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:47:41,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:47:41,747 INFO L87 Difference]: Start difference. First operand 9804 states and 44451 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:42,127 INFO L93 Difference]: Finished difference Result 32096 states and 147329 transitions. [2021-02-19 18:47:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:47:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:47:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:42,178 INFO L225 Difference]: With dead ends: 32096 [2021-02-19 18:47:42,178 INFO L226 Difference]: Without dead ends: 16159 [2021-02-19 18:47:42,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:47:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-02-19 18:47:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-02-19 18:47:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 4.493828399397892) internal successors, (44781), 9965 states have internal predecessors, (44781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-02-19 18:47:42,449 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-02-19 18:47:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:42,449 INFO L480 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-02-19 18:47:42,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-02-19 18:47:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:47:42,469 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:42,469 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:42,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:42,670 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1643502442, now seen corresponding path program 3 times [2021-02-19 18:47:42,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:42,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509792103] [2021-02-19 18:47:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509792103] [2021-02-19 18:47:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325126338] [2021-02-19 18:47:42,761 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:42,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:47:42,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:42,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:47:42,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:42,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:47:42,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:42,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:42,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:42,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 18:47:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:42,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:42,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 18:47:42,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615822767] [2021-02-19 18:47:42,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:47:42,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:42,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:47:42,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:47:42,888 INFO L87 Difference]: Start difference. First operand 9966 states and 44781 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:43,533 INFO L93 Difference]: Finished difference Result 38248 states and 176153 transitions. [2021-02-19 18:47:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:47:43,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:47:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:43,600 INFO L225 Difference]: With dead ends: 38248 [2021-02-19 18:47:43,600 INFO L226 Difference]: Without dead ends: 19645 [2021-02-19 18:47:43,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:47:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-02-19 18:47:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-02-19 18:47:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10784 states have (on average 4.496012611275964) internal successors, (48485), 10784 states have internal predecessors, (48485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-02-19 18:47:43,926 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-02-19 18:47:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:43,926 INFO L480 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-02-19 18:47:43,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-02-19 18:47:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:47:43,950 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:43,950 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:44,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:44,151 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash -101922294, now seen corresponding path program 4 times [2021-02-19 18:47:44,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:44,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540353761] [2021-02-19 18:47:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:44,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540353761] [2021-02-19 18:47:44,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003672277] [2021-02-19 18:47:44,293 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:44,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:47:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:47:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:44,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-02-19 18:47:44,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:44,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:44,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:44,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 18:47:44,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-02-19 18:47:44,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:44,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:44,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:44,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-02-19 18:47:44,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:47:44,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:44,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:44,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:44,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 18:47:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:44,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:44,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 18:47:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908434696] [2021-02-19 18:47:44,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:47:44,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:47:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:47:44,468 INFO L87 Difference]: Start difference. First operand 10785 states and 48485 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:45,401 INFO L93 Difference]: Finished difference Result 29883 states and 135356 transitions. [2021-02-19 18:47:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:47:45,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:47:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:45,450 INFO L225 Difference]: With dead ends: 29883 [2021-02-19 18:47:45,450 INFO L226 Difference]: Without dead ends: 17348 [2021-02-19 18:47:45,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:47:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-02-19 18:47:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-02-19 18:47:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 4.473569679934718) internal successors, (49339), 11029 states have internal predecessors, (49339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-02-19 18:47:45,720 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-02-19 18:47:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:45,720 INFO L480 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-02-19 18:47:45,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-02-19 18:47:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:47:45,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:45,744 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:45,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:47:45,946 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash -467726670, now seen corresponding path program 5 times [2021-02-19 18:47:45,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:45,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504680668] [2021-02-19 18:47:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:47:46,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504680668] [2021-02-19 18:47:46,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688005720] [2021-02-19 18:47:46,085 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:46,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:47:46,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:46,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 18:47:46,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:46,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-02-19 18:47:46,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:46,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:46,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:46,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 18:47:46,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 18:47:46,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:46,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:46,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:46,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-02-19 18:47:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:47:46,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:46,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-02-19 18:47:46,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91664331] [2021-02-19 18:47:46,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:47:46,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:47:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:47:46,349 INFO L87 Difference]: Start difference. First operand 11030 states and 49339 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:48,262 INFO L93 Difference]: Finished difference Result 53450 states and 243228 transitions. [2021-02-19 18:47:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:47:48,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 39 [2021-02-19 18:47:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:48,342 INFO L225 Difference]: With dead ends: 53450 [2021-02-19 18:47:48,342 INFO L226 Difference]: Without dead ends: 23918 [2021-02-19 18:47:48,343 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:47:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23918 states. [2021-02-19 18:47:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23918 to 11491. [2021-02-19 18:47:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 4.465883376849434) internal successors, (51313), 11490 states have internal predecessors, (51313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 51313 transitions. [2021-02-19 18:47:48,716 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 51313 transitions. Word has length 39 [2021-02-19 18:47:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:48,716 INFO L480 AbstractCegarLoop]: Abstraction has 11491 states and 51313 transitions. [2021-02-19 18:47:48,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 51313 transitions. [2021-02-19 18:47:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:47:48,742 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:48,742 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:48,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:47:48,943 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:48,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1976330924, now seen corresponding path program 6 times [2021-02-19 18:47:48,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:48,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116840833] [2021-02-19 18:47:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116840833] [2021-02-19 18:47:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838801966] [2021-02-19 18:47:49,033 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:49,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:47:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:47:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:49,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-02-19 18:47:49,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:49,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:49,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:49,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-02-19 18:47:49,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 18:47:49,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:47:49,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:47:49,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:47:49,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 18:47:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:49,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:49,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 18:47:49,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616530005] [2021-02-19 18:47:49,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 18:47:49,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 18:47:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:47:49,172 INFO L87 Difference]: Start difference. First operand 11491 states and 51313 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:49,652 INFO L93 Difference]: Finished difference Result 31654 states and 142983 transitions. [2021-02-19 18:47:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:47:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:47:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:49,704 INFO L225 Difference]: With dead ends: 31654 [2021-02-19 18:47:49,705 INFO L226 Difference]: Without dead ends: 19293 [2021-02-19 18:47:49,705 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:47:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19293 states. [2021-02-19 18:47:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19293 to 11315. [2021-02-19 18:47:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11315 states, 11314 states have (on average 4.472246773908432) internal successors, (50599), 11314 states have internal predecessors, (50599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-02-19 18:47:50,082 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-02-19 18:47:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:50,082 INFO L480 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-02-19 18:47:50,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-02-19 18:47:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 18:47:50,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:50,109 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:50,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 18:47:50,310 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1665062351, now seen corresponding path program 7 times [2021-02-19 18:47:50,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:50,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657947831] [2021-02-19 18:47:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:50,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657947831] [2021-02-19 18:47:50,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941450583] [2021-02-19 18:47:50,352 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:47:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:50,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:50,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 18:47:50,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928896628] [2021-02-19 18:47:50,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:47:50,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:50,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:47:50,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:47:50,450 INFO L87 Difference]: Start difference. First operand 11315 states and 50599 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:50,715 INFO L93 Difference]: Finished difference Result 24589 states and 110955 transitions. [2021-02-19 18:47:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:47:50,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 42 [2021-02-19 18:47:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:50,805 INFO L225 Difference]: With dead ends: 24589 [2021-02-19 18:47:50,805 INFO L226 Difference]: Without dead ends: 24453 [2021-02-19 18:47:50,805 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24453 states. [2021-02-19 18:47:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24453 to 17865. [2021-02-19 18:47:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17865 states, 17864 states have (on average 4.617163009404389) internal successors, (82481), 17864 states have internal predecessors, (82481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17865 states to 17865 states and 82481 transitions. [2021-02-19 18:47:51,406 INFO L78 Accepts]: Start accepts. Automaton has 17865 states and 82481 transitions. Word has length 42 [2021-02-19 18:47:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:51,407 INFO L480 AbstractCegarLoop]: Abstraction has 17865 states and 82481 transitions. [2021-02-19 18:47:51,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17865 states and 82481 transitions. [2021-02-19 18:47:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 18:47:51,451 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:51,451 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:51,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:51,651 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash 433798583, now seen corresponding path program 8 times [2021-02-19 18:47:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:51,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569433425] [2021-02-19 18:47:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:51,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569433425] [2021-02-19 18:47:51,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972316299] [2021-02-19 18:47:51,675 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:51,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:47:51,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:47:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:47:51,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:51,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:47:51,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710815524] [2021-02-19 18:47:51,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:47:51,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:47:51,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:51,804 INFO L87 Difference]: Start difference. First operand 17865 states and 82481 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:52,851 INFO L93 Difference]: Finished difference Result 72505 states and 323180 transitions. [2021-02-19 18:47:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:47:52,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 18:47:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:53,135 INFO L225 Difference]: With dead ends: 72505 [2021-02-19 18:47:53,135 INFO L226 Difference]: Without dead ends: 72505 [2021-02-19 18:47:53,136 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:47:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72505 states. [2021-02-19 18:47:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72505 to 32375. [2021-02-19 18:47:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32375 states, 32374 states have (on average 4.726200037066782) internal successors, (153006), 32374 states have internal predecessors, (153006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32375 states to 32375 states and 153006 transitions. [2021-02-19 18:47:54,657 INFO L78 Accepts]: Start accepts. Automaton has 32375 states and 153006 transitions. Word has length 42 [2021-02-19 18:47:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:54,657 INFO L480 AbstractCegarLoop]: Abstraction has 32375 states and 153006 transitions. [2021-02-19 18:47:54,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 32375 states and 153006 transitions. [2021-02-19 18:47:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 18:47:54,728 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:47:54,728 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:47:54,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:54,929 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:47:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:47:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash -876634677, now seen corresponding path program 9 times [2021-02-19 18:47:54,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:47:54,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807064987] [2021-02-19 18:47:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:47:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:47:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:47:54,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807064987] [2021-02-19 18:47:54,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948150083] [2021-02-19 18:47:54,964 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:47:54,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:47:54,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:47:54,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:47:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:47:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:47:55,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:47:55,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:47:55,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818444639] [2021-02-19 18:47:55,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:47:55,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:47:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:47:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:47:55,084 INFO L87 Difference]: Start difference. First operand 32375 states and 153006 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:47:56,518 INFO L93 Difference]: Finished difference Result 105844 states and 506959 transitions. [2021-02-19 18:47:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:47:56,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 18:47:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:47:56,988 INFO L225 Difference]: With dead ends: 105844 [2021-02-19 18:47:56,989 INFO L226 Difference]: Without dead ends: 105734 [2021-02-19 18:47:56,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:47:57,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105734 states. [2021-02-19 18:47:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105734 to 71666. [2021-02-19 18:47:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71666 states, 71665 states have (on average 4.997027837856694) internal successors, (358112), 71665 states have internal predecessors, (358112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71666 states to 71666 states and 358112 transitions. [2021-02-19 18:47:59,766 INFO L78 Accepts]: Start accepts. Automaton has 71666 states and 358112 transitions. Word has length 42 [2021-02-19 18:47:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:47:59,766 INFO L480 AbstractCegarLoop]: Abstraction has 71666 states and 358112 transitions. [2021-02-19 18:47:59,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:47:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 71666 states and 358112 transitions. [2021-02-19 18:48:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 18:48:00,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:00,005 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:00,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:00,205 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:48:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash 7004202, now seen corresponding path program 10 times [2021-02-19 18:48:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:00,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005519958] [2021-02-19 18:48:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:00,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005519958] [2021-02-19 18:48:00,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726917926] [2021-02-19 18:48:00,247 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:00,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:48:00,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:00,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:48:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:48:00,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:00,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-02-19 18:48:00,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327705145] [2021-02-19 18:48:00,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:48:00,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:48:00,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:48:00,356 INFO L87 Difference]: Start difference. First operand 71666 states and 358112 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:01,982 INFO L93 Difference]: Finished difference Result 175535 states and 883417 transitions. [2021-02-19 18:48:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:48:01,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 18:48:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:02,883 INFO L225 Difference]: With dead ends: 175535 [2021-02-19 18:48:02,883 INFO L226 Difference]: Without dead ends: 170010 [2021-02-19 18:48:02,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:48:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170010 states. [2021-02-19 18:48:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170010 to 141071. [2021-02-19 18:48:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141071 states, 141070 states have (on average 5.143864747997448) internal successors, (725645), 141070 states have internal predecessors, (725645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141071 states to 141071 states and 725645 transitions. [2021-02-19 18:48:11,619 INFO L78 Accepts]: Start accepts. Automaton has 141071 states and 725645 transitions. Word has length 42 [2021-02-19 18:48:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:11,620 INFO L480 AbstractCegarLoop]: Abstraction has 141071 states and 725645 transitions. [2021-02-19 18:48:11,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 141071 states and 725645 transitions. [2021-02-19 18:48:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 18:48:12,176 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:12,177 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:12,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-02-19 18:48:12,378 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:48:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash 982625292, now seen corresponding path program 11 times [2021-02-19 18:48:12,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:12,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88331551] [2021-02-19 18:48:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:12,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88331551] [2021-02-19 18:48:12,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851253737] [2021-02-19 18:48:12,403 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:12,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:48:12,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 18:48:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:12,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:12,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 18:48:12,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371629728] [2021-02-19 18:48:12,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:48:12,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:48:12,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:48:12,503 INFO L87 Difference]: Start difference. First operand 141071 states and 725645 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:17,339 INFO L93 Difference]: Finished difference Result 359891 states and 1835814 transitions. [2021-02-19 18:48:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:48:17,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 18:48:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:19,811 INFO L225 Difference]: With dead ends: 359891 [2021-02-19 18:48:19,811 INFO L226 Difference]: Without dead ends: 353037 [2021-02-19 18:48:19,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:48:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353037 states. [2021-02-19 18:48:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353037 to 262871. [2021-02-19 18:48:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262871 states, 262870 states have (on average 5.252634382013923) internal successors, (1380760), 262870 states have internal predecessors, (1380760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262871 states to 262871 states and 1380760 transitions. [2021-02-19 18:48:31,605 INFO L78 Accepts]: Start accepts. Automaton has 262871 states and 1380760 transitions. Word has length 42 [2021-02-19 18:48:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:48:31,605 INFO L480 AbstractCegarLoop]: Abstraction has 262871 states and 1380760 transitions. [2021-02-19 18:48:31,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 262871 states and 1380760 transitions. [2021-02-19 18:48:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 18:48:32,635 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:48:32,635 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:48:32,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:48:32,842 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 18:48:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:48:32,842 INFO L82 PathProgramCache]: Analyzing trace with hash -803347340, now seen corresponding path program 12 times [2021-02-19 18:48:32,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:48:32,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420195946] [2021-02-19 18:48:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:48:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:48:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 18:48:32,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420195946] [2021-02-19 18:48:32,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671640714] [2021-02-19 18:48:32,875 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:48:32,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:48:32,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:48:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:48:32,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:48:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:48:32,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:48:32,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 18:48:32,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353568363] [2021-02-19 18:48:32,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:48:32,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:48:32,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:48:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:48:32,980 INFO L87 Difference]: Start difference. First operand 262871 states and 1380760 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:48:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:48:42,590 INFO L93 Difference]: Finished difference Result 674569 states and 3456412 transitions. [2021-02-19 18:48:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:48:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 18:48:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:48:47,052 INFO L225 Difference]: With dead ends: 674569 [2021-02-19 18:48:47,053 INFO L226 Difference]: Without dead ends: 663440 [2021-02-19 18:48:47,053 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=521, Invalid=1831, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:48:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663440 states.