/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/figure1-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:11:25,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:11:25,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:11:25,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:11:25,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:11:25,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:11:25,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:11:25,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:11:25,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:11:25,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:11:25,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:11:25,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:11:25,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:11:25,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:11:25,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:11:25,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:11:25,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:11:25,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:11:25,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:11:25,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:11:25,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:11:25,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:11:25,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:11:25,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:11:25,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:11:25,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:11:25,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:11:25,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:11:25,840 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 18:11:25,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:11:25,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:11:25,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:11:25,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:11:25,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:11:25,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:11:25,869 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:11:25,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:11:25,870 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:11:25,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:11:25,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:11:25,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:11:25,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:11:25,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:11:25,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:11:25,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:11:25,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:11:25,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:11:25,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:11:25,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:11:25,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:11:25,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:11:25,873 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:11:25,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:11:25,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:11:26,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:11:26,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:11:26,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:11:26,163 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:11:26,163 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:11:26,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl [2021-02-19 18:11:26,164 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl' [2021-02-19 18:11:26,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:11:26,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:11:26,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:11:26,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:11:26,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:11:26,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:11:26,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:11:26,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:11:26,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:11:26,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/1) ... [2021-02-19 18:11:26,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:11:26,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:11:26,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:11:26,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:11:26,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (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 18:11:26,265 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:11:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:11:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:11:26,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:11:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:11:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:11:26,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:11:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:11:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:11:26,267 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 18:11:26,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:11:26,445 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:11:26,446 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:11:26 BoogieIcfgContainer [2021-02-19 18:11:26,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:11:26,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:11:26,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:11:26,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:11:26,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:11:26" (1/2) ... [2021-02-19 18:11:26,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af9ef4c and model type figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:11:26, skipping insertion in model container [2021-02-19 18:11:26,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:11:26" (2/2) ... [2021-02-19 18:11:26,450 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.bpl [2021-02-19 18:11:26,454 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:11:26,454 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:11:26,456 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:11:26,457 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:11:26,518 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 18:11:26,529 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 18:11:26,557 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:11:26,557 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:11:26,557 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:11:26,557 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:11:26,557 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:11:26,557 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:11:26,557 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:11:26,557 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:11:26,563 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-02-19 18:11:26,584 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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 18:11:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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 18:11:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 18:11:26,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:26,590 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:26,590 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1121195020, now seen corresponding path program 1 times [2021-02-19 18:11:26,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:26,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532257414] [2021-02-19 18:11:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:26,891 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 18:11:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532257414] [2021-02-19 18:11:26,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:11:26,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 18:11:26,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575935694] [2021-02-19 18:11:26,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:11:26,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:26,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:11:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:11:26,906 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:27,066 INFO L93 Difference]: Finished difference Result 67 states and 111 transitions. [2021-02-19 18:11:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:11:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 18:11:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:27,073 INFO L225 Difference]: With dead ends: 67 [2021-02-19 18:11:27,073 INFO L226 Difference]: Without dead ends: 52 [2021-02-19 18:11:27,074 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:11:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-19 18:11:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-02-19 18:11:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 69 transitions. [2021-02-19 18:11:27,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 69 transitions. Word has length 15 [2021-02-19 18:11:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:27,096 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 69 transitions. [2021-02-19 18:11:27,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 69 transitions. [2021-02-19 18:11:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 18:11:27,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:27,097 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:27,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:11:27,098 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:27,098 INFO L82 PathProgramCache]: Analyzing trace with hash -471126050, now seen corresponding path program 2 times [2021-02-19 18:11:27,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:27,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069040653] [2021-02-19 18:11:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:27,194 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 18:11:27,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069040653] [2021-02-19 18:11:27,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:11:27,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 18:11:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227451602] [2021-02-19 18:11:27,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:11:27,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:11:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:11:27,196 INFO L87 Difference]: Start difference. First operand 39 states and 69 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:27,306 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-02-19 18:11:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:11:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 18:11:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:27,308 INFO L225 Difference]: With dead ends: 50 [2021-02-19 18:11:27,308 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 18:11:27,309 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 18:11:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 18:11:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-02-19 18:11:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-02-19 18:11:27,313 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-02-19 18:11:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:27,313 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-02-19 18:11:27,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-02-19 18:11:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 18:11:27,314 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:27,314 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:27,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:11:27,314 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1057113994, now seen corresponding path program 1 times [2021-02-19 18:11:27,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:27,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127730461] [2021-02-19 18:11:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:27,408 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 18:11:27,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127730461] [2021-02-19 18:11:27,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102825922] [2021-02-19 18:11:27,409 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 18:11:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:11:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:27,699 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 18:11:27,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:27,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:11:27,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756362354] [2021-02-19 18:11:27,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:27,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:27,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:27,701 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:27,972 INFO L93 Difference]: Finished difference Result 107 states and 185 transitions. [2021-02-19 18:11:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:11:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 18:11:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:27,977 INFO L225 Difference]: With dead ends: 107 [2021-02-19 18:11:27,979 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 18:11:27,980 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:11:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 18:11:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2021-02-19 18:11:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-02-19 18:11:28,012 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-02-19 18:11:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:28,012 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-02-19 18:11:28,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-02-19 18:11:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 18:11:28,013 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:28,013 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:28,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 18:11:28,228 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:28,228 INFO L82 PathProgramCache]: Analyzing trace with hash -407045024, now seen corresponding path program 2 times [2021-02-19 18:11:28,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:28,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194237435] [2021-02-19 18:11:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:28,343 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 18:11:28,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194237435] [2021-02-19 18:11:28,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809190841] [2021-02-19 18:11:28,343 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 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 18:11:28,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:11:28,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:11:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:28,561 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 18:11:28,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:28,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:11:28,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147205160] [2021-02-19 18:11:28,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:28,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:28,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:28,562 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:28,879 INFO L93 Difference]: Finished difference Result 117 states and 198 transitions. [2021-02-19 18:11:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 18:11:28,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 18:11:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:28,881 INFO L225 Difference]: With dead ends: 117 [2021-02-19 18:11:28,882 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 18:11:28,882 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:11:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 18:11:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2021-02-19 18:11:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-02-19 18:11:28,895 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-02-19 18:11:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:28,896 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-02-19 18:11:28,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-02-19 18:11:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 18:11:28,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:28,896 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:29,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:29,110 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:29,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1827062470, now seen corresponding path program 3 times [2021-02-19 18:11:29,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:29,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206914895] [2021-02-19 18:11:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:29,216 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 18:11:29,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206914895] [2021-02-19 18:11:29,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519638897] [2021-02-19 18:11:29,217 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 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 18:11:29,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:11:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:11:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:29,441 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 18:11:29,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:29,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:11:29,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580052170] [2021-02-19 18:11:29,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:29,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:29,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:29,443 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:29,730 INFO L93 Difference]: Finished difference Result 94 states and 156 transitions. [2021-02-19 18:11:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:11:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 18:11:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:29,731 INFO L225 Difference]: With dead ends: 94 [2021-02-19 18:11:29,731 INFO L226 Difference]: Without dead ends: 80 [2021-02-19 18:11:29,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:11:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-19 18:11:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-02-19 18:11:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 93 transitions. [2021-02-19 18:11:29,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 93 transitions. Word has length 17 [2021-02-19 18:11:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:29,734 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 93 transitions. [2021-02-19 18:11:29,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 93 transitions. [2021-02-19 18:11:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 18:11:29,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:29,735 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:29,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:29,935 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1291832668, now seen corresponding path program 4 times [2021-02-19 18:11:29,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:29,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056587010] [2021-02-19 18:11:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:30,013 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 18:11:30,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056587010] [2021-02-19 18:11:30,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807304279] [2021-02-19 18:11:30,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:11:30,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:11:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 18:11:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:30,212 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 18:11:30,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:30,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 18:11:30,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437791480] [2021-02-19 18:11:30,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 18:11:30,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 18:11:30,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 18:11:30,214 INFO L87 Difference]: Start difference. First operand 52 states and 93 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:30,427 INFO L93 Difference]: Finished difference Result 87 states and 147 transitions. [2021-02-19 18:11:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 18:11:30,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 18:11:30,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:30,428 INFO L225 Difference]: With dead ends: 87 [2021-02-19 18:11:30,428 INFO L226 Difference]: Without dead ends: 49 [2021-02-19 18:11:30,429 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:11:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-19 18:11:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-02-19 18:11:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 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 18:11:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-02-19 18:11:30,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-02-19 18:11:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:30,431 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-02-19 18:11:30,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-02-19 18:11:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:11:30,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:30,431 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:30,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:30,638 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1098015156, now seen corresponding path program 1 times [2021-02-19 18:11:30,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:30,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054147136] [2021-02-19 18:11:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:30,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054147136] [2021-02-19 18:11:30,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251382007] [2021-02-19 18:11:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:11:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:11:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:30,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:30,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:11:30,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710892029] [2021-02-19 18:11:30,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:30,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:30,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:30,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:30,927 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:31,159 INFO L93 Difference]: Finished difference Result 113 states and 197 transitions. [2021-02-19 18:11:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:11:31,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:11:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:31,160 INFO L225 Difference]: With dead ends: 113 [2021-02-19 18:11:31,160 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 18:11:31,160 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:11:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 18:11:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-02-19 18:11:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-02-19 18:11:31,163 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 19 [2021-02-19 18:11:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:31,163 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-02-19 18:11:31,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-02-19 18:11:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:11:31,163 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:31,163 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:31,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 18:11:31,364 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash -166912704, now seen corresponding path program 2 times [2021-02-19 18:11:31,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:31,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202116308] [2021-02-19 18:11:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:31,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202116308] [2021-02-19 18:11:31,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811453538] [2021-02-19 18:11:31,444 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 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 18:11:31,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:11:31,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 18:11:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:31,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:31,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:11:31,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646952389] [2021-02-19 18:11:31,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:31,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:31,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:31,634 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:31,924 INFO L93 Difference]: Finished difference Result 120 states and 202 transitions. [2021-02-19 18:11:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:11:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:11:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:31,925 INFO L225 Difference]: With dead ends: 120 [2021-02-19 18:11:31,925 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 18:11:31,926 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:11:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 18:11:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-02-19 18:11:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 101 transitions. [2021-02-19 18:11:31,935 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 101 transitions. Word has length 19 [2021-02-19 18:11:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:31,936 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 101 transitions. [2021-02-19 18:11:31,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 101 transitions. [2021-02-19 18:11:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:11:31,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:31,939 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:32,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:32,148 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash 969272568, now seen corresponding path program 3 times [2021-02-19 18:11:32,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:32,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437924313] [2021-02-19 18:11:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:32,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437924313] [2021-02-19 18:11:32,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440398484] [2021-02-19 18:11:32,233 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 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 18:11:32,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:11:32,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:32,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:11:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:32,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:32,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:11:32,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854413147] [2021-02-19 18:11:32,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:32,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:32,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:32,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:32,450 INFO L87 Difference]: Start difference. First operand 56 states and 101 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:32,774 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-02-19 18:11:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:11:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:11:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:32,775 INFO L225 Difference]: With dead ends: 130 [2021-02-19 18:11:32,775 INFO L226 Difference]: Without dead ends: 110 [2021-02-19 18:11:32,775 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:11:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-19 18:11:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2021-02-19 18:11:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 120 transitions. [2021-02-19 18:11:32,778 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 120 transitions. Word has length 19 [2021-02-19 18:11:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:32,778 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 120 transitions. [2021-02-19 18:11:32,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 120 transitions. [2021-02-19 18:11:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:11:32,778 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:32,778 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:32,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:32,990 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1619341538, now seen corresponding path program 4 times [2021-02-19 18:11:32,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:32,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875696065] [2021-02-19 18:11:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875696065] [2021-02-19 18:11:33,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737311635] [2021-02-19 18:11:33,077 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 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 18:11:33,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:11:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:11:33,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:33,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:33,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:11:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402154799] [2021-02-19 18:11:33,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:33,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:33,285 INFO L87 Difference]: Start difference. First operand 65 states and 120 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:33,593 INFO L93 Difference]: Finished difference Result 106 states and 184 transitions. [2021-02-19 18:11:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:11:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:11:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:33,594 INFO L225 Difference]: With dead ends: 106 [2021-02-19 18:11:33,594 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 18:11:33,594 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:11:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 18:11:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-02-19 18:11:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 66 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2021-02-19 18:11:33,597 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 19 [2021-02-19 18:11:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:33,597 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2021-02-19 18:11:33,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2021-02-19 18:11:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:11:33,597 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:33,597 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:33,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 18:11:33,818 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:33,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:33,819 INFO L82 PathProgramCache]: Analyzing trace with hash 41380604, now seen corresponding path program 5 times [2021-02-19 18:11:33,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:33,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300066873] [2021-02-19 18:11:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300066873] [2021-02-19 18:11:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688829898] [2021-02-19 18:11:33,900 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 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 18:11:33,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:11:33,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:33,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:11:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:34,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:34,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:11:34,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885570164] [2021-02-19 18:11:34,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:34,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:34,090 INFO L87 Difference]: Start difference. First operand 67 states and 123 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:34,239 INFO L93 Difference]: Finished difference Result 95 states and 164 transitions. [2021-02-19 18:11:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:11:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:11:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:34,240 INFO L225 Difference]: With dead ends: 95 [2021-02-19 18:11:34,240 INFO L226 Difference]: Without dead ends: 82 [2021-02-19 18:11:34,240 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:11:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-19 18:11:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-02-19 18:11:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 117 transitions. [2021-02-19 18:11:34,242 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 117 transitions. Word has length 19 [2021-02-19 18:11:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:34,243 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 117 transitions. [2021-02-19 18:11:34,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 117 transitions. [2021-02-19 18:11:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:11:34,243 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:34,243 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:34,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:34,450 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:34,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1177565876, now seen corresponding path program 6 times [2021-02-19 18:11:34,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:34,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374796968] [2021-02-19 18:11:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374796968] [2021-02-19 18:11:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496178082] [2021-02-19 18:11:34,566 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 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 18:11:34,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:11:34,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 18:11:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:34,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:34,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:11:34,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524705734] [2021-02-19 18:11:34,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:34,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:34,777 INFO L87 Difference]: Start difference. First operand 64 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:34,875 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2021-02-19 18:11:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:11:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:11:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:34,876 INFO L225 Difference]: With dead ends: 86 [2021-02-19 18:11:34,876 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 18:11:34,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 18:11:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-02-19 18:11:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 58 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2021-02-19 18:11:34,878 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 19 [2021-02-19 18:11:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:34,878 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2021-02-19 18:11:34,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2021-02-19 18:11:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:11:34,879 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:34,879 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:35,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:35,086 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1827634846, now seen corresponding path program 7 times [2021-02-19 18:11:35,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:35,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42644399] [2021-02-19 18:11:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:35,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42644399] [2021-02-19 18:11:35,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375385723] [2021-02-19 18:11:35,170 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 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 18:11:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 18:11:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:35,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:35,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 18:11:35,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688561224] [2021-02-19 18:11:35,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:11:35,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:11:35,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:11:35,359 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:35,471 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-02-19 18:11:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:11:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:11:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:35,472 INFO L225 Difference]: With dead ends: 74 [2021-02-19 18:11:35,472 INFO L226 Difference]: Without dead ends: 67 [2021-02-19 18:11:35,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-19 18:11:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-02-19 18:11:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 100 transitions. [2021-02-19 18:11:35,473 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 100 transitions. Word has length 19 [2021-02-19 18:11:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:35,474 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 100 transitions. [2021-02-19 18:11:35,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 100 transitions. [2021-02-19 18:11:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:35,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:35,474 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:35,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 18:11:35,678 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash 916856118, now seen corresponding path program 8 times [2021-02-19 18:11:35,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:35,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449118886] [2021-02-19 18:11:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:11:35,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449118886] [2021-02-19 18:11:35,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335861648] [2021-02-19 18:11:35,763 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 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 18:11:35,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:11:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:11:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:35,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:35,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:11:35,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662390464] [2021-02-19 18:11:35,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:11:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:11:35,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:11:35,950 INFO L87 Difference]: Start difference. First operand 56 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:36,439 INFO L93 Difference]: Finished difference Result 107 states and 190 transitions. [2021-02-19 18:11:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:11:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:36,440 INFO L225 Difference]: With dead ends: 107 [2021-02-19 18:11:36,440 INFO L226 Difference]: Without dead ends: 65 [2021-02-19 18:11:36,441 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:11:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-19 18:11:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-02-19 18:11:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 87 transitions. [2021-02-19 18:11:36,442 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 87 transitions. Word has length 21 [2021-02-19 18:11:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:36,442 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 87 transitions. [2021-02-19 18:11:36,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 87 transitions. [2021-02-19 18:11:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:36,443 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:36,443 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:36,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 18:11:36,649 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash -348071742, now seen corresponding path program 9 times [2021-02-19 18:11:36,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:36,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483908801] [2021-02-19 18:11:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:11:36,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483908801] [2021-02-19 18:11:36,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053374037] [2021-02-19 18:11:36,735 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 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 18:11:36,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:11:36,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:36,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:11:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:36,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:36,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:11:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448993413] [2021-02-19 18:11:36,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:11:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:11:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:11:36,937 INFO L87 Difference]: Start difference. First operand 51 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:37,532 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2021-02-19 18:11:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:11:37,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:37,534 INFO L225 Difference]: With dead ends: 85 [2021-02-19 18:11:37,534 INFO L226 Difference]: Without dead ends: 56 [2021-02-19 18:11:37,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:11:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-19 18:11:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-02-19 18:11:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 81 transitions. [2021-02-19 18:11:37,536 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 81 transitions. Word has length 21 [2021-02-19 18:11:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:37,536 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 81 transitions. [2021-02-19 18:11:37,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 81 transitions. [2021-02-19 18:11:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:37,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:37,536 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:37,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:11:37,738 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:37,738 INFO L82 PathProgramCache]: Analyzing trace with hash 788113530, now seen corresponding path program 10 times [2021-02-19 18:11:37,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:37,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692665528] [2021-02-19 18:11:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:11:37,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692665528] [2021-02-19 18:11:37,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953733662] [2021-02-19 18:11:37,822 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 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 18:11:37,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:11:37,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:37,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:11:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:38,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:38,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:11:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913532143] [2021-02-19 18:11:38,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:11:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:11:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:11:38,005 INFO L87 Difference]: Start difference. First operand 48 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:38,786 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2021-02-19 18:11:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:11:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:38,787 INFO L225 Difference]: With dead ends: 90 [2021-02-19 18:11:38,787 INFO L226 Difference]: Without dead ends: 70 [2021-02-19 18:11:38,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:11:38,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-19 18:11:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-02-19 18:11:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-02-19 18:11:38,791 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-02-19 18:11:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:38,791 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-02-19 18:11:38,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-02-19 18:11:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:38,791 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:38,791 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:39,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:39,002 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:39,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:39,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1438182500, now seen corresponding path program 11 times [2021-02-19 18:11:39,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:39,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527412140] [2021-02-19 18:11:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:11:39,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527412140] [2021-02-19 18:11:39,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955418251] [2021-02-19 18:11:39,084 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 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 18:11:39,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:11:39,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:11:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:39,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:39,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 18:11:39,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746062412] [2021-02-19 18:11:39,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 18:11:39,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 18:11:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:11:39,293 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:40,147 INFO L93 Difference]: Finished difference Result 79 states and 133 transitions. [2021-02-19 18:11:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:11:40,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:40,147 INFO L225 Difference]: With dead ends: 79 [2021-02-19 18:11:40,148 INFO L226 Difference]: Without dead ends: 65 [2021-02-19 18:11:40,148 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:11:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-19 18:11:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-02-19 18:11:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-02-19 18:11:40,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-02-19 18:11:40,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:40,150 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-02-19 18:11:40,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-02-19 18:11:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:40,150 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:40,150 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:40,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:11:40,362 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1674756474, now seen corresponding path program 12 times [2021-02-19 18:11:40,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:40,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565668162] [2021-02-19 18:11:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:40,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565668162] [2021-02-19 18:11:40,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604797675] [2021-02-19 18:11:40,453 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 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 18:11:40,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:11:40,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:11:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:40,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:40,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98644775] [2021-02-19 18:11:40,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:40,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:40,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:40,669 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:41,078 INFO L93 Difference]: Finished difference Result 107 states and 173 transitions. [2021-02-19 18:11:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:11:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:41,078 INFO L225 Difference]: With dead ends: 107 [2021-02-19 18:11:41,078 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 18:11:41,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:11:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 18:11:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2021-02-19 18:11:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 87 transitions. [2021-02-19 18:11:41,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 87 transitions. Word has length 21 [2021-02-19 18:11:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:41,080 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 87 transitions. [2021-02-19 18:11:41,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 87 transitions. [2021-02-19 18:11:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:41,081 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:41,081 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:41,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:11:41,289 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1734412542, now seen corresponding path program 13 times [2021-02-19 18:11:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:41,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005906065] [2021-02-19 18:11:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:41,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005906065] [2021-02-19 18:11:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679581328] [2021-02-19 18:11:41,374 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 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 18:11:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:11:41,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:41,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:41,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:41,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099576582] [2021-02-19 18:11:41,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:41,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:41,599 INFO L87 Difference]: Start difference. First operand 49 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:41,967 INFO L93 Difference]: Finished difference Result 114 states and 189 transitions. [2021-02-19 18:11:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:11:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:41,967 INFO L225 Difference]: With dead ends: 114 [2021-02-19 18:11:41,967 INFO L226 Difference]: Without dead ends: 100 [2021-02-19 18:11:41,968 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:11:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-19 18:11:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2021-02-19 18:11:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2021-02-19 18:11:41,969 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 21 [2021-02-19 18:11:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:41,970 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2021-02-19 18:11:41,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2021-02-19 18:11:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:41,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:41,970 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:42,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:42,178 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash 721720010, now seen corresponding path program 14 times [2021-02-19 18:11:42,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:42,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499761802] [2021-02-19 18:11:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:42,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499761802] [2021-02-19 18:11:42,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8127084] [2021-02-19 18:11:42,270 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 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 18:11:42,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:11:42,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:11:42,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:42,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:42,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:42,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390489757] [2021-02-19 18:11:42,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:42,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:42,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:42,492 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:43,051 INFO L93 Difference]: Finished difference Result 182 states and 297 transitions. [2021-02-19 18:11:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:11:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:43,052 INFO L225 Difference]: With dead ends: 182 [2021-02-19 18:11:43,052 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 18:11:43,053 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:11:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 18:11:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-02-19 18:11:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 104 transitions. [2021-02-19 18:11:43,055 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 104 transitions. Word has length 21 [2021-02-19 18:11:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:43,055 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 104 transitions. [2021-02-19 18:11:43,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 104 transitions. [2021-02-19 18:11:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:43,055 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:43,055 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:43,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:43,258 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 186490208, now seen corresponding path program 15 times [2021-02-19 18:11:43,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:43,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393177577] [2021-02-19 18:11:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:43,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393177577] [2021-02-19 18:11:43,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885151963] [2021-02-19 18:11:43,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:11:43,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:11:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:43,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:43,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:43,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825576684] [2021-02-19 18:11:43,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:43,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:43,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:43,578 INFO L87 Difference]: Start difference. First operand 55 states and 104 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:44,087 INFO L93 Difference]: Finished difference Result 143 states and 238 transitions. [2021-02-19 18:11:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:11:44,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:44,088 INFO L225 Difference]: With dead ends: 143 [2021-02-19 18:11:44,088 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 18:11:44,089 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:11:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 18:11:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2021-02-19 18:11:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 83 transitions. [2021-02-19 18:11:44,090 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 83 transitions. Word has length 21 [2021-02-19 18:11:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:44,090 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 83 transitions. [2021-02-19 18:11:44,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 83 transitions. [2021-02-19 18:11:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:44,091 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:44,091 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:44,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:44,305 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 889441090, now seen corresponding path program 16 times [2021-02-19 18:11:44,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:44,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030016337] [2021-02-19 18:11:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:44,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030016337] [2021-02-19 18:11:44,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5556805] [2021-02-19 18:11:44,390 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:44,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:11:44,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 18:11:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:44,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:44,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:44,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368916121] [2021-02-19 18:11:44,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:44,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:44,598 INFO L87 Difference]: Start difference. First operand 47 states and 83 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:44,908 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-02-19 18:11:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:11:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:44,908 INFO L225 Difference]: With dead ends: 97 [2021-02-19 18:11:44,908 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 18:11:44,909 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:11:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 18:11:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-02-19 18:11:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 62 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2021-02-19 18:11:44,910 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 21 [2021-02-19 18:11:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:44,910 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2021-02-19 18:11:44,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2021-02-19 18:11:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:44,911 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:44,911 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:45,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 18:11:45,118 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:45,119 INFO L82 PathProgramCache]: Analyzing trace with hash -123251442, now seen corresponding path program 17 times [2021-02-19 18:11:45,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:45,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261397927] [2021-02-19 18:11:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:45,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261397927] [2021-02-19 18:11:45,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140057770] [2021-02-19 18:11:45,207 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:11:45,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:11:45,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:11:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:45,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:45,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:45,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395508484] [2021-02-19 18:11:45,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:45,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:45,430 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:45,905 INFO L93 Difference]: Finished difference Result 133 states and 227 transitions. [2021-02-19 18:11:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:11:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:45,906 INFO L225 Difference]: With dead ends: 133 [2021-02-19 18:11:45,906 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 18:11:45,907 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:11:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 18:11:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2021-02-19 18:11:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 66 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 126 transitions. [2021-02-19 18:11:45,908 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 126 transitions. Word has length 21 [2021-02-19 18:11:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:45,909 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 126 transitions. [2021-02-19 18:11:45,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 126 transitions. [2021-02-19 18:11:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:11:45,909 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:45,909 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:46,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:11:46,118 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:46,118 INFO L82 PathProgramCache]: Analyzing trace with hash -658481244, now seen corresponding path program 18 times [2021-02-19 18:11:46,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:46,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704077985] [2021-02-19 18:11:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:46,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704077985] [2021-02-19 18:11:46,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759094372] [2021-02-19 18:11:46,210 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:46,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:11:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:11:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:46,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:46,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:11:46,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994488581] [2021-02-19 18:11:46,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:46,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:46,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:46,436 INFO L87 Difference]: Start difference. First operand 67 states and 126 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:46,840 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-02-19 18:11:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:11:46,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:11:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:46,840 INFO L225 Difference]: With dead ends: 111 [2021-02-19 18:11:46,840 INFO L226 Difference]: Without dead ends: 73 [2021-02-19 18:11:46,841 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:11:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-19 18:11:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-02-19 18:11:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 99 transitions. [2021-02-19 18:11:46,842 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 99 transitions. Word has length 21 [2021-02-19 18:11:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:46,842 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 99 transitions. [2021-02-19 18:11:46,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 99 transitions. [2021-02-19 18:11:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:11:46,843 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:46,843 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:47,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:47,054 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash 325067144, now seen corresponding path program 19 times [2021-02-19 18:11:47,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:47,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760565052] [2021-02-19 18:11:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:11:47,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760565052] [2021-02-19 18:11:47,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851585725] [2021-02-19 18:11:47,125 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:47,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:11:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:47,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:47,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 18:11:47,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338998761] [2021-02-19 18:11:47,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:47,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:47,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:47,332 INFO L87 Difference]: Start difference. First operand 57 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:47,807 INFO L93 Difference]: Finished difference Result 109 states and 188 transitions. [2021-02-19 18:11:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:11:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:11:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:47,808 INFO L225 Difference]: With dead ends: 109 [2021-02-19 18:11:47,808 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 18:11:47,809 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:11:47,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 18:11:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2021-02-19 18:11:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 60 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2021-02-19 18:11:47,810 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 23 [2021-02-19 18:11:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:47,810 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2021-02-19 18:11:47,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2021-02-19 18:11:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:11:47,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:47,811 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:48,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 18:11:48,011 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash -560731136, now seen corresponding path program 20 times [2021-02-19 18:11:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:48,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802159511] [2021-02-19 18:11:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:11:48,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802159511] [2021-02-19 18:11:48,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104290221] [2021-02-19 18:11:48,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:48,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:11:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:48,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:11:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:48,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:48,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 18:11:48,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974990946] [2021-02-19 18:11:48,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:48,293 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:48,761 INFO L93 Difference]: Finished difference Result 120 states and 210 transitions. [2021-02-19 18:11:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:11:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:11:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:48,762 INFO L225 Difference]: With dead ends: 120 [2021-02-19 18:11:48,762 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 18:11:48,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:11:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 18:11:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2021-02-19 18:11:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 108 transitions. [2021-02-19 18:11:48,764 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 108 transitions. Word has length 23 [2021-02-19 18:11:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:48,764 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 108 transitions. [2021-02-19 18:11:48,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 108 transitions. [2021-02-19 18:11:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:11:48,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:48,764 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:48,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:48,978 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:48,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1573423668, now seen corresponding path program 21 times [2021-02-19 18:11:48,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:48,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978432258] [2021-02-19 18:11:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:11:49,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978432258] [2021-02-19 18:11:49,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511225797] [2021-02-19 18:11:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:49,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:11:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:49,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:11:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:49,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:49,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 18:11:49,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67982947] [2021-02-19 18:11:49,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:49,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:49,265 INFO L87 Difference]: Start difference. First operand 61 states and 108 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:50,019 INFO L93 Difference]: Finished difference Result 116 states and 202 transitions. [2021-02-19 18:11:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 18:11:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:11:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:50,020 INFO L225 Difference]: With dead ends: 116 [2021-02-19 18:11:50,020 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 18:11:50,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:11:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 18:11:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-02-19 18:11:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-02-19 18:11:50,026 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 23 [2021-02-19 18:11:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:50,026 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-02-19 18:11:50,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-02-19 18:11:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:11:50,027 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:11:50,027 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:11:50,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:11:50,234 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:11:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:11:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2108653470, now seen corresponding path program 22 times [2021-02-19 18:11:50,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:11:50,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063800913] [2021-02-19 18:11:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:11:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:11:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:11:50,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063800913] [2021-02-19 18:11:50,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891981776] [2021-02-19 18:11:50,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:11:50,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:11:50,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:11:50,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:11:50,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:11:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:11:50,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:11:50,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 18:11:50,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835127489] [2021-02-19 18:11:50,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:11:50,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:11:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:11:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:11:50,528 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:11:51,042 INFO L93 Difference]: Finished difference Result 92 states and 163 transitions. [2021-02-19 18:11:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:11:51,042 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:11:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:11:51,042 INFO L225 Difference]: With dead ends: 92 [2021-02-19 18:11:51,042 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 18:11:51,043 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=1380, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 18:11:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 18:11:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 18:11:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 18:11:51,043 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-02-19 18:11:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:11:51,043 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 18:11:51,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:11:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 18:11:51,043 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 18:11:51,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 18:11:51,262 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:11:51 BasicIcfg [2021-02-19 18:11:51,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:11:51,263 INFO L168 Benchmark]: Toolchain (without parser) took 25077.71 ms. Allocated memory was 255.9 MB in the beginning and 459.3 MB in the end (delta: 203.4 MB). Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 206.4 MB. Max. memory is 16.0 GB. [2021-02-19 18:11:51,263 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 174.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:11:51,263 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:11:51,263 INFO L168 Benchmark]: Boogie Preprocessor took 10.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 856.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:11:51,263 INFO L168 Benchmark]: RCFGBuilder took 227.21 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-02-19 18:11:51,264 INFO L168 Benchmark]: TraceAbstraction took 24815.39 ms. Allocated memory was 255.9 MB in the beginning and 459.3 MB in the end (delta: 203.4 MB). Free memory was 237.4 MB in the beginning and 235.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 206.8 MB. Max. memory is 16.0 GB. [2021-02-19 18:11:51,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 174.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 856.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 227.21 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 238.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 24815.39 ms. Allocated memory was 255.9 MB in the beginning and 459.3 MB in the end (delta: 203.4 MB). Free memory was 237.4 MB in the beginning and 235.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 206.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.7s, OverallIterations: 28, TraceHistogramMax: 3, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 546 SDtfs, 3102 SDslu, 3645 SDs, 0 SdLazy, 6940 SolverSat, 414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 289 SyntacticMatches, 26 SemanticMatches, 903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 848 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 1078 NumberOfCodeBlocks, 1078 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1024 ConstructedInterpolants, 0 QuantifiedInterpolants, 245396 SizeOfPredicates, 130 NumberOfNonLiveVariables, 1085 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 14/226 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...