/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:31,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:31,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:31,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:31,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:32,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:32,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:32,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:32,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:32,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:32,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:32,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:56:32,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:56:32,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:56:32,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:56:32,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:56:32,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:56:32,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:56:32,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:56:32,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:56:32,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:56:32,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:56:32,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:56:32,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:56:32,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:56:32,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:56:32,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:56:32,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:56:32,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 10:56:32,048 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:32,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:32,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:32,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:32,050 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:32,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:32,050 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:32,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:32,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:32,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:32,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:32,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:32,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:32,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:32,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:32,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:32,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:32,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:32,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:32,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:32,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:32,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:32,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:32,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:32,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:32,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:32,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:32,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:32,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:32,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:32,319 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:32,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:32,337 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:32,339 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:32,339 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:32,340 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-07 10:56:32,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcbfa5a64/1317c34e55534491b692bca609a6b219/FLAG396af7a54 [2020-07-07 10:56:32,892 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:32,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-07 10:56:32,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcbfa5a64/1317c34e55534491b692bca609a6b219/FLAG396af7a54 [2020-07-07 10:56:33,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcbfa5a64/1317c34e55534491b692bca609a6b219 [2020-07-07 10:56:33,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:33,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:33,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:33,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:33,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:33,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692da698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33, skipping insertion in model container [2020-07-07 10:56:33,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:33,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:33,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:33,489 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:56:33,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:33,526 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:56:33,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33 WrapperNode [2020-07-07 10:56:33,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:33,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:56:33,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:56:33,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:56:33,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (1/1) ... [2020-07-07 10:56:33,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:56:33,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:56:33,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:56:33,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:56:33,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (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 [2020-07-07 10:56:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:56:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:56:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-07 10:56:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-07 10:56:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:56:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:56:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 10:56:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-07 10:56:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-07 10:56:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:56:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:56:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:56:33,987 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:56:33,987 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 10:56:33,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:33 BoogieIcfgContainer [2020-07-07 10:56:33,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:56:33,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:56:33,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:56:33,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:56:33,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:33" (1/3) ... [2020-07-07 10:56:33,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681bbf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:33, skipping insertion in model container [2020-07-07 10:56:33,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:33" (2/3) ... [2020-07-07 10:56:34,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681bbf91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:33, skipping insertion in model container [2020-07-07 10:56:34,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:33" (3/3) ... [2020-07-07 10:56:34,002 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-07-07 10:56:34,014 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:56:34,027 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:56:34,058 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:56:34,099 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:56:34,100 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:56:34,100 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:56:34,100 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:56:34,100 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:56:34,101 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:56:34,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:56:34,101 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:56:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-07 10:56:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 10:56:34,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:34,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:34,128 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-07-07 10:56:34,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:34,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536639856] [2020-07-07 10:56:34,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:56:34,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536639856] [2020-07-07 10:56:34,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:34,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 10:56:34,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624348466] [2020-07-07 10:56:34,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:56:34,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:56:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:34,533 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-07 10:56:34,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:34,811 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-07-07 10:56:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:56:34,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-07 10:56:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:34,843 INFO L225 Difference]: With dead ends: 41 [2020-07-07 10:56:34,844 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 10:56:34,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 10:56:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 10:56:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 10:56:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-07 10:56:34,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-07 10:56:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:34,904 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-07 10:56:34,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:56:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-07 10:56:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 10:56:34,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:34,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:34,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 10:56:34,908 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-07-07 10:56:34,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:34,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145845086] [2020-07-07 10:56:34,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:56:35,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145845086] [2020-07-07 10:56:35,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:35,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 10:56:35,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887259612] [2020-07-07 10:56:35,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:56:35,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:56:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:35,113 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-07-07 10:56:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:35,240 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-07 10:56:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:56:35,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-07 10:56:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:35,243 INFO L225 Difference]: With dead ends: 33 [2020-07-07 10:56:35,243 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 10:56:35,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 10:56:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-07 10:56:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 10:56:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-07 10:56:35,253 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-07-07 10:56:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:35,253 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-07 10:56:35,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:56:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-07 10:56:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 10:56:35,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:35,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:35,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 10:56:35,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-07-07 10:56:35,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:35,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480422598] [2020-07-07 10:56:35,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:56:35,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480422598] [2020-07-07 10:56:35,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:35,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 10:56:35,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623612985] [2020-07-07 10:56:35,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 10:56:35,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 10:56:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:35,331 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-07 10:56:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:35,373 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-07-07 10:56:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:56:35,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-07 10:56:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:35,376 INFO L225 Difference]: With dead ends: 41 [2020-07-07 10:56:35,376 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 10:56:35,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 10:56:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-07 10:56:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 10:56:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-07 10:56:35,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-07-07 10:56:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:35,385 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-07 10:56:35,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 10:56:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-07 10:56:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 10:56:35,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:35,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:35,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 10:56:35,387 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-07-07 10:56:35,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:35,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116200271] [2020-07-07 10:56:35,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:56:35,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116200271] [2020-07-07 10:56:35,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:35,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 10:56:35,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521525796] [2020-07-07 10:56:35,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 10:56:35,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 10:56:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:35,584 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-07 10:56:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:35,752 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-07-07 10:56:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 10:56:35,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-07 10:56:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:35,754 INFO L225 Difference]: With dead ends: 36 [2020-07-07 10:56:35,755 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 10:56:35,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 10:56:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-07 10:56:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 10:56:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-07 10:56:35,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-07-07 10:56:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:35,763 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-07 10:56:35,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 10:56:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-07 10:56:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 10:56:35,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:35,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:35,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 10:56:35,765 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-07-07 10:56:35,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:35,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845850216] [2020-07-07 10:56:35,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:56:35,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845850216] [2020-07-07 10:56:35,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:35,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 10:56:35,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198343550] [2020-07-07 10:56:35,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 10:56:35,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 10:56:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:35,861 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-07-07 10:56:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:35,914 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-07-07 10:56:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:56:35,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-07 10:56:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:35,916 INFO L225 Difference]: With dead ends: 42 [2020-07-07 10:56:35,916 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 10:56:35,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 10:56:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 10:56:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 10:56:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-07 10:56:35,923 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-07-07 10:56:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:35,924 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-07 10:56:35,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 10:56:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-07 10:56:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 10:56:35,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:35,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:35,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 10:56:35,926 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:35,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-07-07 10:56:35,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:35,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913752577] [2020-07-07 10:56:35,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-07 10:56:36,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913752577] [2020-07-07 10:56:36,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717636008] [2020-07-07 10:56:36,146 INFO L94 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 [2020-07-07 10:56:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-07 10:56:36,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:36,259 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:36,261 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-07 10:56:36,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:36,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-07 10:56:36,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377397200] [2020-07-07 10:56:36,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 10:56:36,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 10:56:36,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-07 10:56:36,383 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-07-07 10:56:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:36,646 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-07 10:56:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 10:56:36,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-07-07 10:56:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:36,648 INFO L225 Difference]: With dead ends: 42 [2020-07-07 10:56:36,648 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 10:56:36,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-07-07 10:56:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 10:56:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-07 10:56:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 10:56:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-07 10:56:36,655 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-07-07 10:56:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:36,656 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-07 10:56:36,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 10:56:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-07 10:56:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 10:56:36,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:36,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:36,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 10:56:36,858 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-07-07 10:56:36,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:36,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514978819] [2020-07-07 10:56:36,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 10:56:37,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514978819] [2020-07-07 10:56:37,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000810821] [2020-07-07 10:56:37,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-07 10:56:37,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:37,377 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:37,378 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 10:56:37,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:37,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-07-07 10:56:37,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450897791] [2020-07-07 10:56:37,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 10:56:37,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 10:56:37,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-07-07 10:56:37,481 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 22 states. [2020-07-07 10:56:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:37,893 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-07 10:56:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 10:56:37,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-07-07 10:56:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:37,894 INFO L225 Difference]: With dead ends: 48 [2020-07-07 10:56:37,894 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 10:56:37,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-07-07 10:56:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 10:56:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-07 10:56:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 10:56:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-07 10:56:37,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-07-07 10:56:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:37,902 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-07 10:56:37,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 10:56:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-07 10:56:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 10:56:37,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:37,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:38,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:38,105 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-07-07 10:56:38,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:38,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484322277] [2020-07-07 10:56:38,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-07 10:56:38,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484322277] [2020-07-07 10:56:38,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220602342] [2020-07-07 10:56:38,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:38,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:38,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:38,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-07 10:56:38,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:38,477 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:38,478 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-07 10:56:38,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:38,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-07 10:56:38,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607691205] [2020-07-07 10:56:38,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 10:56:38,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:38,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 10:56:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-07-07 10:56:38,565 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 17 states. [2020-07-07 10:56:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:38,935 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-07-07 10:56:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 10:56:38,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-07 10:56:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:38,937 INFO L225 Difference]: With dead ends: 54 [2020-07-07 10:56:38,937 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 10:56:38,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-07-07 10:56:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 10:56:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-07-07 10:56:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 10:56:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-07 10:56:38,947 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-07-07 10:56:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:38,947 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-07 10:56:38,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 10:56:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-07 10:56:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 10:56:38,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:38,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:39,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:39,154 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-07-07 10:56:39,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:39,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479200058] [2020-07-07 10:56:39,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 10:56:39,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479200058] [2020-07-07 10:56:39,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588610123] [2020-07-07 10:56:39,514 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-07 10:56:39,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:39,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:39,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-07 10:56:39,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:39,891 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:39,892 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 10:56:40,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:40,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2020-07-07 10:56:40,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235945045] [2020-07-07 10:56:40,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 10:56:40,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:40,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 10:56:40,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-07-07 10:56:40,008 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 30 states. [2020-07-07 10:56:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:40,714 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-07 10:56:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 10:56:40,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2020-07-07 10:56:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:40,716 INFO L225 Difference]: With dead ends: 60 [2020-07-07 10:56:40,716 INFO L226 Difference]: Without dead ends: 56 [2020-07-07 10:56:40,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 10:56:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-07 10:56:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-07-07 10:56:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 10:56:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-07-07 10:56:40,724 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-07-07 10:56:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:40,724 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-07-07 10:56:40,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-07 10:56:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-07-07 10:56:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-07 10:56:40,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:40,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:40,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:40,941 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-07-07 10:56:40,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:40,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108712237] [2020-07-07 10:56:40,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-07 10:56:41,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108712237] [2020-07-07 10:56:41,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085259040] [2020-07-07 10:56:41,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:41,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 10:56:41,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:41,440 WARN L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 64 conjunts are in the unsatisfiable core [2020-07-07 10:56:41,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:41,501 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:41,502 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-07 10:56:41,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:41,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-07 10:56:41,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888848287] [2020-07-07 10:56:41,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 10:56:41,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:41,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 10:56:41,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-07 10:56:41,619 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2020-07-07 10:56:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:42,237 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-07 10:56:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:56:42,237 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-07-07 10:56:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:42,238 INFO L225 Difference]: With dead ends: 66 [2020-07-07 10:56:42,239 INFO L226 Difference]: Without dead ends: 62 [2020-07-07 10:56:42,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 10:56:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-07 10:56:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-07 10:56:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 10:56:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-07 10:56:42,247 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-07-07 10:56:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:42,248 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-07 10:56:42,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 10:56:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-07 10:56:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-07 10:56:42,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:42,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:42,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-07 10:56:42,460 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-07-07 10:56:42,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:42,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855832890] [2020-07-07 10:56:42,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-07 10:56:43,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855832890] [2020-07-07 10:56:43,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069718517] [2020-07-07 10:56:43,021 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:43,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 10:56:43,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:43,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 56 conjunts are in the unsatisfiable core [2020-07-07 10:56:43,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:43,631 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:43,631 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-07 10:56:43,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:43,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2020-07-07 10:56:43,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223615115] [2020-07-07 10:56:43,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-07 10:56:43,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-07 10:56:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 10:56:43,777 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 38 states. [2020-07-07 10:56:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:44,845 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-07-07 10:56:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:56:44,845 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 64 [2020-07-07 10:56:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:44,847 INFO L225 Difference]: With dead ends: 72 [2020-07-07 10:56:44,847 INFO L226 Difference]: Without dead ends: 68 [2020-07-07 10:56:44,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=170, Invalid=2692, Unknown=0, NotChecked=0, Total=2862 [2020-07-07 10:56:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-07 10:56:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-07-07 10:56:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 10:56:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-07-07 10:56:44,861 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-07-07 10:56:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:44,863 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-07-07 10:56:44,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-07 10:56:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-07-07 10:56:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 10:56:44,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:44,865 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:45,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:45,066 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-07-07 10:56:45,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:45,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142224132] [2020-07-07 10:56:45,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-07 10:56:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142224132] [2020-07-07 10:56:45,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513816634] [2020-07-07 10:56:45,711 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:45,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:56:45,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:45,769 WARN L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 80 conjunts are in the unsatisfiable core [2020-07-07 10:56:45,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:45,827 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:45,828 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-07 10:56:45,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:45,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-07 10:56:45,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387258074] [2020-07-07 10:56:45,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 10:56:45,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 10:56:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-07-07 10:56:45,952 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 25 states. [2020-07-07 10:56:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:46,794 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-07-07 10:56:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:56:46,795 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-07-07 10:56:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:46,796 INFO L225 Difference]: With dead ends: 78 [2020-07-07 10:56:46,797 INFO L226 Difference]: Without dead ends: 74 [2020-07-07 10:56:46,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 10:56:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-07 10:56:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-07-07 10:56:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 10:56:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-07-07 10:56:46,805 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-07-07 10:56:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:46,805 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-07-07 10:56:46,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 10:56:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-07-07 10:56:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-07 10:56:46,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:46,807 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:47,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:47,011 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-07-07 10:56:47,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:47,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076610236] [2020-07-07 10:56:47,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-07 10:56:47,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076610236] [2020-07-07 10:56:47,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125625069] [2020-07-07 10:56:47,735 INFO L92 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 [2020-07-07 10:56:47,771 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:56:47,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:47,774 WARN L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 88 conjunts are in the unsatisfiable core [2020-07-07 10:56:47,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:47,876 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:47,877 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-07-07 10:56:47,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:47,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-07-07 10:56:47,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412796369] [2020-07-07 10:56:47,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 10:56:47,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 10:56:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-07-07 10:56:47,994 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 28 states. [2020-07-07 10:56:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:48,970 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-07-07 10:56:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:56:48,971 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 78 [2020-07-07 10:56:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:48,972 INFO L225 Difference]: With dead ends: 84 [2020-07-07 10:56:48,972 INFO L226 Difference]: Without dead ends: 80 [2020-07-07 10:56:48,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 10:56:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-07 10:56:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-07-07 10:56:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 10:56:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-07-07 10:56:48,981 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-07-07 10:56:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:48,981 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-07-07 10:56:48,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 10:56:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-07-07 10:56:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 10:56:48,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:48,983 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:49,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 10:56:49,191 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:49,192 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-07-07 10:56:49,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:49,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785896731] [2020-07-07 10:56:49,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-07 10:56:50,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785896731] [2020-07-07 10:56:50,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819911498] [2020-07-07 10:56:50,028 INFO L92 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 [2020-07-07 10:56:50,070 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 10:56:50,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:50,072 WARN L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-07 10:56:50,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:50,153 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:50,153 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-07 10:56:50,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:50,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-07-07 10:56:50,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675479044] [2020-07-07 10:56:50,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-07 10:56:50,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:50,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-07 10:56:50,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-07-07 10:56:50,287 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 29 states. [2020-07-07 10:56:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:51,471 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-07-07 10:56:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 10:56:51,472 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-07-07 10:56:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:51,474 INFO L225 Difference]: With dead ends: 90 [2020-07-07 10:56:51,474 INFO L226 Difference]: Without dead ends: 86 [2020-07-07 10:56:51,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 10:56:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-07 10:56:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-07-07 10:56:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 10:56:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-07-07 10:56:51,482 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-07-07 10:56:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:51,483 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-07-07 10:56:51,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-07 10:56:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-07-07 10:56:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-07 10:56:51,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:51,485 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:51,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:51,693 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:51,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-07-07 10:56:51,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:51,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502436003] [2020-07-07 10:56:51,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-07 10:56:52,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502436003] [2020-07-07 10:56:52,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962644835] [2020-07-07 10:56:52,613 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:52,658 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 10:56:52,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:52,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 80 conjunts are in the unsatisfiable core [2020-07-07 10:56:52,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:53,777 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:53,778 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-07 10:56:53,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:53,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2020-07-07 10:56:53,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945452628] [2020-07-07 10:56:53,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-07 10:56:53,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:53,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-07 10:56:53,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-07-07 10:56:53,947 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 54 states. [2020-07-07 10:56:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:56,090 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-07-07 10:56:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 10:56:56,090 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 92 [2020-07-07 10:56:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:56,092 INFO L225 Difference]: With dead ends: 96 [2020-07-07 10:56:56,092 INFO L226 Difference]: Without dead ends: 92 [2020-07-07 10:56:56,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=250, Invalid=5756, Unknown=0, NotChecked=0, Total=6006 [2020-07-07 10:56:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-07 10:56:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-07 10:56:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 10:56:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-07-07 10:56:56,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-07-07 10:56:56,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:56,101 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-07-07 10:56:56,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-07 10:56:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-07-07 10:56:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-07 10:56:56,103 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:56,104 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:56,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-07 10:56:56,325 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-07-07 10:56:56,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:56,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100126256] [2020-07-07 10:56:56,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-07 10:56:57,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100126256] [2020-07-07 10:56:57,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702367636] [2020-07-07 10:56:57,354 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:57,408 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 10:56:57,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:57,411 WARN L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 112 conjunts are in the unsatisfiable core [2020-07-07 10:56:57,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:57,470 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:56:57,471 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:56:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-07-07 10:56:57,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:57,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-07-07 10:56:57,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031104807] [2020-07-07 10:56:57,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-07 10:56:57,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:57,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-07 10:56:57,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 10:56:57,639 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 33 states. [2020-07-07 10:56:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:59,157 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-07 10:56:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-07 10:56:59,159 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2020-07-07 10:56:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:59,159 INFO L225 Difference]: With dead ends: 102 [2020-07-07 10:56:59,160 INFO L226 Difference]: Without dead ends: 98 [2020-07-07 10:56:59,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2020-07-07 10:56:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-07 10:56:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-07-07 10:56:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 10:56:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-07-07 10:56:59,167 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-07-07 10:56:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:59,167 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-07-07 10:56:59,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-07 10:56:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-07-07 10:56:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-07 10:56:59,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:59,169 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:59,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 10:56:59,375 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-07-07 10:56:59,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:59,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252394676] [2020-07-07 10:56:59,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-07 10:57:00,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252394676] [2020-07-07 10:57:00,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938174858] [2020-07-07 10:57:00,594 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 10:57:00,642 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 10:57:00,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:00,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 92 conjunts are in the unsatisfiable core [2020-07-07 10:57:00,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:02,178 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:02,179 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-07-07 10:57:02,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:02,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 62 [2020-07-07 10:57:02,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346112659] [2020-07-07 10:57:02,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-07 10:57:02,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-07 10:57:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-07-07 10:57:02,367 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 62 states. [2020-07-07 10:57:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:05,250 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-07-07 10:57:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-07 10:57:05,250 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 106 [2020-07-07 10:57:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:05,251 INFO L225 Difference]: With dead ends: 108 [2020-07-07 10:57:05,251 INFO L226 Difference]: Without dead ends: 104 [2020-07-07 10:57:05,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=290, Invalid=7720, Unknown=0, NotChecked=0, Total=8010 [2020-07-07 10:57:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-07 10:57:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-07-07 10:57:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 10:57:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-07-07 10:57:05,260 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-07-07 10:57:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:05,260 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-07-07 10:57:05,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-07 10:57:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-07-07 10:57:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-07-07 10:57:05,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:05,262 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:05,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 10:57:05,474 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-07-07 10:57:05,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:05,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993817741] [2020-07-07 10:57:05,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-07 10:57:06,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993817741] [2020-07-07 10:57:06,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523853930] [2020-07-07 10:57:06,834 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-07-07 10:57:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,883 WARN L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 128 conjunts are in the unsatisfiable core [2020-07-07 10:57:06,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:06,947 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:06,948 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-07 10:57:07,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:07,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-07-07 10:57:07,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450677224] [2020-07-07 10:57:07,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 10:57:07,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:07,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 10:57:07,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 10:57:07,103 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 37 states. [2020-07-07 10:57:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:09,069 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-07-07 10:57:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-07 10:57:09,070 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2020-07-07 10:57:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:09,072 INFO L225 Difference]: With dead ends: 114 [2020-07-07 10:57:09,072 INFO L226 Difference]: Without dead ends: 110 [2020-07-07 10:57:09,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 10:57:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-07 10:57:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-07-07 10:57:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 10:57:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-07-07 10:57:09,080 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-07-07 10:57:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:09,081 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-07-07 10:57:09,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 10:57:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-07-07 10:57:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-07 10:57:09,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:09,083 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:09,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 10:57:09,297 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:09,298 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-07-07 10:57:09,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:09,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828719201] [2020-07-07 10:57:09,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-07 10:57:10,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828719201] [2020-07-07 10:57:10,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856426896] [2020-07-07 10:57:10,817 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:10,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 104 conjunts are in the unsatisfiable core [2020-07-07 10:57:10,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:12,862 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:12,864 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-07 10:57:13,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:13,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 70 [2020-07-07 10:57:13,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596844661] [2020-07-07 10:57:13,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-07 10:57:13,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-07 10:57:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-07-07 10:57:13,078 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 70 states. [2020-07-07 10:57:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:16,409 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-07-07 10:57:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-07 10:57:16,409 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 120 [2020-07-07 10:57:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:16,410 INFO L225 Difference]: With dead ends: 120 [2020-07-07 10:57:16,411 INFO L226 Difference]: Without dead ends: 116 [2020-07-07 10:57:16,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=330, Invalid=9972, Unknown=0, NotChecked=0, Total=10302 [2020-07-07 10:57:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-07 10:57:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-07-07 10:57:16,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 10:57:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-07-07 10:57:16,421 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-07-07 10:57:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:16,422 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-07-07 10:57:16,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-07 10:57:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-07-07 10:57:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-07 10:57:16,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:16,424 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:16,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:16,637 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-07-07 10:57:16,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:16,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336714261] [2020-07-07 10:57:16,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-07 10:57:18,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336714261] [2020-07-07 10:57:18,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061533584] [2020-07-07 10:57:18,559 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:18,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:57:18,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:18,654 WARN L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 144 conjunts are in the unsatisfiable core [2020-07-07 10:57:18,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:18,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:18,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-07 10:57:18,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:18,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-07-07 10:57:18,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30761082] [2020-07-07 10:57:18,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-07 10:57:18,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:18,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-07 10:57:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 10:57:18,992 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 41 states. [2020-07-07 10:57:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:21,511 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-07-07 10:57:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-07 10:57:21,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 127 [2020-07-07 10:57:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:21,514 INFO L225 Difference]: With dead ends: 126 [2020-07-07 10:57:21,514 INFO L226 Difference]: Without dead ends: 122 [2020-07-07 10:57:21,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 10:57:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-07 10:57:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-07 10:57:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-07 10:57:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-07-07 10:57:21,521 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-07-07 10:57:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:21,522 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-07-07 10:57:21,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-07 10:57:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-07-07 10:57:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-07 10:57:21,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:21,523 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:21,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:21,737 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-07-07 10:57:21,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:21,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080576600] [2020-07-07 10:57:21,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-07 10:57:23,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080576600] [2020-07-07 10:57:23,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396500634] [2020-07-07 10:57:23,491 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:23,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:57:23,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:23,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 116 conjunts are in the unsatisfiable core [2020-07-07 10:57:23,545 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:26,225 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:26,226 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-07 10:57:26,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:26,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 78 [2020-07-07 10:57:26,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192680026] [2020-07-07 10:57:26,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-07 10:57:26,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-07 10:57:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-07-07 10:57:26,471 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 78 states. [2020-07-07 10:57:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:31,032 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-07-07 10:57:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-07 10:57:31,033 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 134 [2020-07-07 10:57:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:31,035 INFO L225 Difference]: With dead ends: 132 [2020-07-07 10:57:31,035 INFO L226 Difference]: Without dead ends: 128 [2020-07-07 10:57:31,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=370, Invalid=12512, Unknown=0, NotChecked=0, Total=12882 [2020-07-07 10:57:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-07 10:57:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-07-07 10:57:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-07 10:57:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-07-07 10:57:31,042 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-07-07 10:57:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:31,042 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-07-07 10:57:31,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-07 10:57:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-07-07 10:57:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-07 10:57:31,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:31,044 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:31,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:31,251 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-07-07 10:57:31,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:31,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648109627] [2020-07-07 10:57:31,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-07 10:57:33,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648109627] [2020-07-07 10:57:33,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272127436] [2020-07-07 10:57:33,717 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:33,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 10:57:33,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:33,775 WARN L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 160 conjunts are in the unsatisfiable core [2020-07-07 10:57:33,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:33,869 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:33,869 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-07 10:57:34,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:34,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-07-07 10:57:34,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542279997] [2020-07-07 10:57:34,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 10:57:34,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 10:57:34,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 10:57:34,081 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 45 states. [2020-07-07 10:57:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:37,123 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-07-07 10:57:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-07 10:57:37,128 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 141 [2020-07-07 10:57:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:37,129 INFO L225 Difference]: With dead ends: 138 [2020-07-07 10:57:37,129 INFO L226 Difference]: Without dead ends: 134 [2020-07-07 10:57:37,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 10:57:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-07 10:57:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-07-07 10:57:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-07 10:57:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-07-07 10:57:37,137 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-07-07 10:57:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:37,137 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-07-07 10:57:37,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 10:57:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-07-07 10:57:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-07 10:57:37,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:37,139 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:37,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-07 10:57:37,350 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-07-07 10:57:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:37,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973950814] [2020-07-07 10:57:37,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-07 10:57:39,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973950814] [2020-07-07 10:57:39,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195955216] [2020-07-07 10:57:39,569 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 10:57:39,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 10:57:39,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:39,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 128 conjunts are in the unsatisfiable core [2020-07-07 10:57:39,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:42,978 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:42,979 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-07-07 10:57:43,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:43,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 86 [2020-07-07 10:57:43,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162263609] [2020-07-07 10:57:43,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-07-07 10:57:43,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-07-07 10:57:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-07-07 10:57:43,230 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 86 states. [2020-07-07 10:57:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:48,683 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-07-07 10:57:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-07 10:57:48,683 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 148 [2020-07-07 10:57:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:48,685 INFO L225 Difference]: With dead ends: 144 [2020-07-07 10:57:48,685 INFO L226 Difference]: Without dead ends: 140 [2020-07-07 10:57:48,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=410, Invalid=15340, Unknown=0, NotChecked=0, Total=15750 [2020-07-07 10:57:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-07 10:57:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-07-07 10:57:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-07 10:57:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-07-07 10:57:48,692 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-07-07 10:57:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:48,693 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-07-07 10:57:48,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-07-07 10:57:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-07-07 10:57:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-07-07 10:57:48,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:48,694 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:48,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-07 10:57:48,908 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-07-07 10:57:48,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:48,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457065197] [2020-07-07 10:57:48,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-07-07 10:57:51,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457065197] [2020-07-07 10:57:51,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751581282] [2020-07-07 10:57:51,477 INFO L92 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:51,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:57:51,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:51,535 WARN L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 176 conjunts are in the unsatisfiable core [2020-07-07 10:57:51,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:51,629 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:51,629 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-07-07 10:57:51,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:51,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-07-07 10:57:51,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426624641] [2020-07-07 10:57:51,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-07 10:57:51,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-07 10:57:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 10:57:51,864 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 49 states. [2020-07-07 10:57:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:55,544 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-07-07 10:57:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-07 10:57:55,549 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 155 [2020-07-07 10:57:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:55,551 INFO L225 Difference]: With dead ends: 150 [2020-07-07 10:57:55,551 INFO L226 Difference]: Without dead ends: 146 [2020-07-07 10:57:55,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 10:57:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-07 10:57:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-07-07 10:57:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-07 10:57:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-07-07 10:57:55,557 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-07-07 10:57:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:55,558 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-07-07 10:57:55,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-07 10:57:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-07-07 10:57:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-07 10:57:55,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:55,559 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:55,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-07 10:57:55,763 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:55,764 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-07-07 10:57:55,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:55,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883413857] [2020-07-07 10:57:55,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-07-07 10:57:58,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883413857] [2020-07-07 10:57:58,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418563851] [2020-07-07 10:57:58,497 INFO L92 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 [2020-07-07 10:57:58,555 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:57:58,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:58,559 WARN L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 184 conjunts are in the unsatisfiable core [2020-07-07 10:57:58,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:58,812 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:57:58,813 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:57:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-07-07 10:57:59,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:59,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 52 [2020-07-07 10:57:59,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244634754] [2020-07-07 10:57:59,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-07 10:57:59,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-07 10:57:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 10:57:59,019 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 52 states. [2020-07-07 10:58:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:03,217 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-07-07 10:58:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-07 10:58:03,217 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 162 [2020-07-07 10:58:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:03,218 INFO L225 Difference]: With dead ends: 156 [2020-07-07 10:58:03,218 INFO L226 Difference]: Without dead ends: 152 [2020-07-07 10:58:03,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2020-07-07 10:58:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-07 10:58:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-07 10:58:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-07 10:58:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-07-07 10:58:03,225 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 162 [2020-07-07 10:58:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:03,225 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-07-07 10:58:03,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-07 10:58:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-07-07 10:58:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-07 10:58:03,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:03,226 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:03,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-07 10:58:03,439 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1407042496, now seen corresponding path program 11 times [2020-07-07 10:58:03,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:03,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582740637] [2020-07-07 10:58:03,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-07 10:58:06,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582740637] [2020-07-07 10:58:06,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967452464] [2020-07-07 10:58:06,351 INFO L92 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:06,423 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 10:58:06,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:06,426 WARN L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-07 10:58:06,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:06,530 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:58:06,531 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:58:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-07 10:58:06,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:06,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-07-07 10:58:06,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901867888] [2020-07-07 10:58:06,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-07 10:58:06,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:06,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-07 10:58:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 10:58:06,808 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 53 states. [2020-07-07 10:58:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:11,173 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-07-07 10:58:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-07 10:58:11,174 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 169 [2020-07-07 10:58:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:11,175 INFO L225 Difference]: With dead ends: 162 [2020-07-07 10:58:11,176 INFO L226 Difference]: Without dead ends: 158 [2020-07-07 10:58:11,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2020-07-07 10:58:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-07 10:58:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 93. [2020-07-07 10:58:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-07 10:58:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-07-07 10:58:11,183 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 169 [2020-07-07 10:58:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:11,183 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-07-07 10:58:11,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-07 10:58:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-07-07 10:58:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-07 10:58:11,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:11,185 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:11,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-07 10:58:11,399 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 491557311, now seen corresponding path program 11 times [2020-07-07 10:58:11,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:11,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380425893] [2020-07-07 10:58:11,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-07 10:58:14,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380425893] [2020-07-07 10:58:14,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126169010] [2020-07-07 10:58:14,630 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:14,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 10:58:14,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:14,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 152 conjunts are in the unsatisfiable core [2020-07-07 10:58:14,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:19,680 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:58:19,680 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:58:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-07 10:58:20,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:20,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 102 [2020-07-07 10:58:20,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049454640] [2020-07-07 10:58:20,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-07 10:58:20,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:20,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-07 10:58:20,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=10052, Unknown=0, NotChecked=0, Total=10302 [2020-07-07 10:58:20,004 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 102 states. [2020-07-07 10:58:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:28,041 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-07-07 10:58:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-07 10:58:28,041 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 176 [2020-07-07 10:58:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:28,042 INFO L225 Difference]: With dead ends: 168 [2020-07-07 10:58:28,042 INFO L226 Difference]: Without dead ends: 164 [2020-07-07 10:58:28,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=490, Invalid=21860, Unknown=0, NotChecked=0, Total=22350 [2020-07-07 10:58:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-07 10:58:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 96. [2020-07-07 10:58:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 10:58:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-07-07 10:58:28,049 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 176 [2020-07-07 10:58:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:28,050 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-07-07 10:58:28,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-07 10:58:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-07-07 10:58:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-07-07 10:58:28,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:28,051 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:28,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:58:28,266 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash 308359396, now seen corresponding path program 12 times [2020-07-07 10:58:28,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:28,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306310992] [2020-07-07 10:58:28,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-07 10:58:31,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306310992] [2020-07-07 10:58:31,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366029753] [2020-07-07 10:58:31,878 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 10:58:31,949 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 10:58:31,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:31,954 WARN L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 208 conjunts are in the unsatisfiable core [2020-07-07 10:58:31,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:32,067 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:58:32,067 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:58:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-07 10:58:32,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:32,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-07-07 10:58:32,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697943922] [2020-07-07 10:58:32,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-07 10:58:32,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:32,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-07 10:58:32,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 10:58:32,343 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 57 states. [2020-07-07 10:58:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:37,607 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-07-07 10:58:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-07 10:58:37,608 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 183 [2020-07-07 10:58:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:37,610 INFO L225 Difference]: With dead ends: 174 [2020-07-07 10:58:37,611 INFO L226 Difference]: Without dead ends: 170 [2020-07-07 10:58:37,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=314, Invalid=11028, Unknown=0, NotChecked=0, Total=11342 [2020-07-07 10:58:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-07 10:58:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 99. [2020-07-07 10:58:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-07 10:58:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-07-07 10:58:37,617 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 183 [2020-07-07 10:58:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:37,618 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-07-07 10:58:37,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-07 10:58:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-07-07 10:58:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-07 10:58:37,619 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:37,619 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:37,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-07 10:58:37,834 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1601548961, now seen corresponding path program 12 times [2020-07-07 10:58:37,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:37,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863419068] [2020-07-07 10:58:37,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-07 10:58:41,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863419068] [2020-07-07 10:58:41,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052392400] [2020-07-07 10:58:41,973 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 10:58:42,045 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 10:58:42,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:58:42,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 164 conjunts are in the unsatisfiable core [2020-07-07 10:58:42,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:58:48,059 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:58:48,060 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:58:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-07 10:58:48,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:58:48,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 110 [2020-07-07 10:58:48,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460522092] [2020-07-07 10:58:48,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-07-07 10:58:48,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:58:48,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-07-07 10:58:48,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=11720, Unknown=0, NotChecked=0, Total=11990 [2020-07-07 10:58:48,398 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 110 states. [2020-07-07 10:58:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:57,521 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2020-07-07 10:58:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-07 10:58:57,521 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 190 [2020-07-07 10:58:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:57,523 INFO L225 Difference]: With dead ends: 180 [2020-07-07 10:58:57,523 INFO L226 Difference]: Without dead ends: 176 [2020-07-07 10:58:57,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=530, Invalid=25552, Unknown=0, NotChecked=0, Total=26082 [2020-07-07 10:58:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-07 10:58:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 102. [2020-07-07 10:58:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-07 10:58:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-07-07 10:58:57,530 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 190 [2020-07-07 10:58:57,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:58:57,531 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-07-07 10:58:57,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-07-07 10:58:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-07-07 10:58:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-07 10:58:57,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:58:57,532 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:58:57,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-07 10:58:57,734 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:58:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:58:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1837932792, now seen corresponding path program 13 times [2020-07-07 10:58:57,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:58:57,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925841778] [2020-07-07 10:58:57,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:58:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:58:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-07-07 10:59:02,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925841778] [2020-07-07 10:59:02,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262399628] [2020-07-07 10:59:02,263 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-07-07 10:59:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:02,336 WARN L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 224 conjunts are in the unsatisfiable core [2020-07-07 10:59:02,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:02,471 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:59:02,472 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:59:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-07-07 10:59:02,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:02,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-07-07 10:59:02,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403146970] [2020-07-07 10:59:02,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-07 10:59:02,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:02,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-07 10:59:02,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 10:59:02,803 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 61 states. [2020-07-07 10:59:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:09,349 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-07-07 10:59:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-07 10:59:09,356 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 197 [2020-07-07 10:59:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:09,358 INFO L225 Difference]: With dead ends: 186 [2020-07-07 10:59:09,358 INFO L226 Difference]: Without dead ends: 182 [2020-07-07 10:59:09,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 248 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=338, Invalid=12772, Unknown=0, NotChecked=0, Total=13110 [2020-07-07 10:59:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-07 10:59:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 105. [2020-07-07 10:59:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-07 10:59:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-07-07 10:59:09,366 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 197 [2020-07-07 10:59:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:09,367 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-07-07 10:59:09,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-07 10:59:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-07-07 10:59:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-07 10:59:09,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:09,369 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:09,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:09,582 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1277526913, now seen corresponding path program 13 times [2020-07-07 10:59:09,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:09,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782707306] [2020-07-07 10:59:09,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-07 10:59:14,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782707306] [2020-07-07 10:59:14,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330930278] [2020-07-07 10:59:14,362 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-07-07 10:59:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:14,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 176 conjunts are in the unsatisfiable core [2020-07-07 10:59:14,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:22,157 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:59:22,158 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:59:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-07 10:59:22,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:22,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 118 [2020-07-07 10:59:22,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977437237] [2020-07-07 10:59:22,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-07-07 10:59:22,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-07-07 10:59:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=13516, Unknown=0, NotChecked=0, Total=13806 [2020-07-07 10:59:22,553 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 118 states. [2020-07-07 10:59:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:33,960 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-07-07 10:59:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-07-07 10:59:33,961 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 204 [2020-07-07 10:59:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:33,963 INFO L225 Difference]: With dead ends: 192 [2020-07-07 10:59:33,963 INFO L226 Difference]: Without dead ends: 188 [2020-07-07 10:59:33,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=570, Invalid=29532, Unknown=0, NotChecked=0, Total=30102 [2020-07-07 10:59:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-07 10:59:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 108. [2020-07-07 10:59:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-07 10:59:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-07-07 10:59:33,971 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 204 [2020-07-07 10:59:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:33,971 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-07-07 10:59:33,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-07-07 10:59:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-07-07 10:59:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-07 10:59:33,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:33,973 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:34,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:34,188 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1565902508, now seen corresponding path program 14 times [2020-07-07 10:59:34,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:34,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566125315] [2020-07-07 10:59:34,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-07-07 10:59:39,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566125315] [2020-07-07 10:59:39,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956502319] [2020-07-07 10:59:39,612 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:39,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:59:39,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:59:39,698 WARN L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 240 conjunts are in the unsatisfiable core [2020-07-07 10:59:39,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:39,838 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 10:59:39,839 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 10:59:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-07-07 10:59:40,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:40,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-07-07 10:59:40,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297736938] [2020-07-07 10:59:40,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-07 10:59:40,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-07 10:59:40,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2020-07-07 10:59:40,185 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 65 states. [2020-07-07 10:59:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:59:47,895 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2020-07-07 10:59:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-07-07 10:59:47,896 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 211 [2020-07-07 10:59:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:59:47,899 INFO L225 Difference]: With dead ends: 198 [2020-07-07 10:59:47,899 INFO L226 Difference]: Without dead ends: 194 [2020-07-07 10:59:47,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=362, Invalid=14644, Unknown=0, NotChecked=0, Total=15006 [2020-07-07 10:59:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-07 10:59:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2020-07-07 10:59:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-07-07 10:59:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-07-07 10:59:47,908 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 211 [2020-07-07 10:59:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:47,909 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-07-07 10:59:47,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-07 10:59:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-07-07 10:59:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-07 10:59:47,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:47,911 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:48,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-07 10:59:48,124 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1516658463, now seen corresponding path program 14 times [2020-07-07 10:59:48,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:48,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235362124] [2020-07-07 10:59:48,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-07-07 10:59:53,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235362124] [2020-07-07 10:59:53,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682069818] [2020-07-07 10:59:53,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:54,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:59:54,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:59:54,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 188 conjunts are in the unsatisfiable core [2020-07-07 10:59:54,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:03,204 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:00:03,205 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:00:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-07-07 11:00:03,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:03,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 126 [2020-07-07 11:00:03,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859059464] [2020-07-07 11:00:03,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-07-07 11:00:03,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-07-07 11:00:03,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=15440, Unknown=0, NotChecked=0, Total=15750 [2020-07-07 11:00:03,643 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 126 states. [2020-07-07 11:00:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:00:18,005 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-07-07 11:00:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-07 11:00:18,005 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 218 [2020-07-07 11:00:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:00:18,007 INFO L225 Difference]: With dead ends: 204 [2020-07-07 11:00:18,007 INFO L226 Difference]: Without dead ends: 200 [2020-07-07 11:00:18,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=610, Invalid=33800, Unknown=0, NotChecked=0, Total=34410 [2020-07-07 11:00:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-07 11:00:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 114. [2020-07-07 11:00:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-07 11:00:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-07-07 11:00:18,017 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 218 [2020-07-07 11:00:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:00:18,017 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-07-07 11:00:18,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-07-07 11:00:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-07-07 11:00:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-07-07 11:00:18,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:00:18,019 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:00:18,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:18,234 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:00:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:00:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1728931792, now seen corresponding path program 15 times [2020-07-07 11:00:18,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:00:18,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376117487] [2020-07-07 11:00:18,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:00:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-07-07 11:00:24,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376117487] [2020-07-07 11:00:24,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071702303] [2020-07-07 11:00:24,921 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:25,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:00:25,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:00:25,014 WARN L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 256 conjunts are in the unsatisfiable core [2020-07-07 11:00:25,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:25,201 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:00:25,201 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:00:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-07-07 11:00:25,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:25,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-07-07 11:00:25,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472408189] [2020-07-07 11:00:25,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-07 11:00:25,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:25,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-07 11:00:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 11:00:25,569 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 69 states. [2020-07-07 11:00:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:00:35,314 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-07-07 11:00:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-07-07 11:00:35,315 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 225 [2020-07-07 11:00:35,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:00:35,317 INFO L225 Difference]: With dead ends: 210 [2020-07-07 11:00:35,317 INFO L226 Difference]: Without dead ends: 206 [2020-07-07 11:00:35,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 284 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=386, Invalid=16644, Unknown=0, NotChecked=0, Total=17030 [2020-07-07 11:00:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-07 11:00:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 117. [2020-07-07 11:00:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-07 11:00:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-07-07 11:00:35,329 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 225 [2020-07-07 11:00:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:00:35,330 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-07-07 11:00:35,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-07 11:00:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-07-07 11:00:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-07-07 11:00:35,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:00:35,332 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:00:35,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-07 11:00:35,546 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:00:35,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:00:35,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1113639617, now seen corresponding path program 15 times [2020-07-07 11:00:35,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:00:35,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212001054] [2020-07-07 11:00:35,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:00:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:00:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-07-07 11:00:42,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212001054] [2020-07-07 11:00:42,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655845815] [2020-07-07 11:00:42,641 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:00:42,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:00:42,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:00:42,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 200 conjunts are in the unsatisfiable core [2020-07-07 11:00:42,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:00:55,031 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:00:55,032 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:00:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-07-07 11:00:55,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:00:55,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 134 [2020-07-07 11:00:55,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062981832] [2020-07-07 11:00:55,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-07 11:00:55,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:00:55,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-07 11:00:55,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=17492, Unknown=0, NotChecked=0, Total=17822 [2020-07-07 11:00:55,517 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 134 states. [2020-07-07 11:01:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:01:15,117 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-07-07 11:01:15,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-07 11:01:15,117 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 232 [2020-07-07 11:01:15,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:01:15,119 INFO L225 Difference]: With dead ends: 216 [2020-07-07 11:01:15,119 INFO L226 Difference]: Without dead ends: 212 [2020-07-07 11:01:15,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=650, Invalid=38356, Unknown=0, NotChecked=0, Total=39006 [2020-07-07 11:01:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-07 11:01:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2020-07-07 11:01:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-07 11:01:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-07-07 11:01:15,126 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 232 [2020-07-07 11:01:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:01:15,126 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-07-07 11:01:15,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-07 11:01:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-07-07 11:01:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-07-07 11:01:15,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:01:15,128 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:01:15,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:15,343 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:01:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:01:15,343 INFO L82 PathProgramCache]: Analyzing trace with hash 44515956, now seen corresponding path program 16 times [2020-07-07 11:01:15,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:01:15,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624170306] [2020-07-07 11:01:15,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:01:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-07-07 11:01:24,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624170306] [2020-07-07 11:01:24,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623568166] [2020-07-07 11:01:24,287 INFO L92 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:24,368 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:01:24,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:01:24,374 WARN L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 272 conjunts are in the unsatisfiable core [2020-07-07 11:01:24,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:01:24,651 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:01:24,652 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:01:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-07-07 11:01:25,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:01:25,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-07-07 11:01:25,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795905301] [2020-07-07 11:01:25,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-07 11:01:25,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:01:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-07 11:01:25,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 11:01:25,507 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 73 states. [2020-07-07 11:01:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:01:39,077 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-07-07 11:01:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-07 11:01:39,082 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 239 [2020-07-07 11:01:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:01:39,084 INFO L225 Difference]: With dead ends: 222 [2020-07-07 11:01:39,084 INFO L226 Difference]: Without dead ends: 218 [2020-07-07 11:01:39,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 302 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=410, Invalid=18772, Unknown=0, NotChecked=0, Total=19182 [2020-07-07 11:01:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-07 11:01:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 123. [2020-07-07 11:01:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-07 11:01:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-07-07 11:01:39,100 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 239 [2020-07-07 11:01:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:01:39,100 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-07-07 11:01:39,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-07 11:01:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-07-07 11:01:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-07 11:01:39,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:01:39,102 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:01:39,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-07 11:01:39,317 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:01:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:01:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 356400863, now seen corresponding path program 16 times [2020-07-07 11:01:39,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:01:39,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088768235] [2020-07-07 11:01:39,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:01:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:01:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-07-07 11:01:48,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088768235] [2020-07-07 11:01:48,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235033342] [2020-07-07 11:01:48,307 INFO L92 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:01:48,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:01:48,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:01:48,403 WARN L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 280 conjunts are in the unsatisfiable core [2020-07-07 11:01:48,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:01:48,997 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:01:48,998 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:01:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-07-07 11:01:49,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:01:49,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74] total 76 [2020-07-07 11:01:49,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717872051] [2020-07-07 11:01:49,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-07 11:01:49,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:01:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-07 11:01:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5547, Unknown=0, NotChecked=0, Total=5700 [2020-07-07 11:01:49,493 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 76 states. [2020-07-07 11:02:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:02:04,832 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-07-07 11:02:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-07-07 11:02:04,832 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 246 [2020-07-07 11:02:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:02:04,834 INFO L225 Difference]: With dead ends: 228 [2020-07-07 11:02:04,834 INFO L226 Difference]: Without dead ends: 224 [2020-07-07 11:02:04,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=426, Invalid=20166, Unknown=0, NotChecked=0, Total=20592 [2020-07-07 11:02:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-07 11:02:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 126. [2020-07-07 11:02:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-07 11:02:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-07-07 11:02:04,843 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 246 [2020-07-07 11:02:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:02:04,844 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-07-07 11:02:04,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-07-07 11:02:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-07-07 11:02:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-07 11:02:04,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:02:04,846 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:02:05,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-07 11:02:05,105 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:02:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:02:05,106 INFO L82 PathProgramCache]: Analyzing trace with hash -29862248, now seen corresponding path program 17 times [2020-07-07 11:02:05,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:02:05,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185012295] [2020-07-07 11:02:05,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:02:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-07-07 11:02:15,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185012295] [2020-07-07 11:02:15,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704583396] [2020-07-07 11:02:15,079 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:02:15,202 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-07 11:02:15,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:02:15,211 WARN L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 288 conjunts are in the unsatisfiable core [2020-07-07 11:02:15,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:02:15,521 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:02:15,522 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:02:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-07-07 11:02:16,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:02:16,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-07-07 11:02:16,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439398917] [2020-07-07 11:02:16,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-07-07 11:02:16,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:02:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-07-07 11:02:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2020-07-07 11:02:16,106 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 77 states. [2020-07-07 11:02:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:02:33,090 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2020-07-07 11:02:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-07 11:02:33,091 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2020-07-07 11:02:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:02:33,094 INFO L225 Difference]: With dead ends: 234 [2020-07-07 11:02:33,094 INFO L226 Difference]: Without dead ends: 230 [2020-07-07 11:02:33,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=434, Invalid=21028, Unknown=0, NotChecked=0, Total=21462 [2020-07-07 11:02:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-07 11:02:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 129. [2020-07-07 11:02:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-07 11:02:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-07-07 11:02:33,102 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 253 [2020-07-07 11:02:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:02:33,102 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-07-07 11:02:33,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-07-07 11:02:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-07-07 11:02:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-07-07 11:02:33,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:02:33,104 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:02:33,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-07 11:02:33,318 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:02:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:02:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash 256162815, now seen corresponding path program 17 times [2020-07-07 11:02:33,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:02:33,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35088093] [2020-07-07 11:02:33,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:02:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:02:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-07-07 11:02:44,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35088093] [2020-07-07 11:02:44,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599391930] [2020-07-07 11:02:44,739 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:02:44,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-07 11:02:44,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:02:44,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 224 conjunts are in the unsatisfiable core [2020-07-07 11:02:44,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:03:03,334 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:03:03,336 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:03:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-07-07 11:03:04,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:03:04,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 150 [2020-07-07 11:03:04,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53464558] [2020-07-07 11:03:04,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2020-07-07 11:03:04,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:03:04,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2020-07-07 11:03:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=21980, Unknown=0, NotChecked=0, Total=22350 [2020-07-07 11:03:04,149 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 150 states. [2020-07-07 11:03:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:03:43,944 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2020-07-07 11:03:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-07 11:03:43,944 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 260 [2020-07-07 11:03:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:03:43,946 INFO L225 Difference]: With dead ends: 240 [2020-07-07 11:03:43,946 INFO L226 Difference]: Without dead ends: 236 [2020-07-07 11:03:43,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=730, Invalid=48332, Unknown=0, NotChecked=0, Total=49062 [2020-07-07 11:03:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-07 11:03:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2020-07-07 11:03:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-07 11:03:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-07-07 11:03:43,956 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 260 [2020-07-07 11:03:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:03:43,956 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-07-07 11:03:43,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 150 states. [2020-07-07 11:03:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-07-07 11:03:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-07 11:03:43,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:03:43,959 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:03:44,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-07 11:03:44,172 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:03:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:03:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1054712892, now seen corresponding path program 18 times [2020-07-07 11:03:44,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:03:44,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700118840] [2020-07-07 11:03:44,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:03:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:03:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-07 11:03:58,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700118840] [2020-07-07 11:03:58,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410282240] [2020-07-07 11:03:58,374 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:03:58,516 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-07 11:03:58,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:03:58,521 WARN L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 304 conjunts are in the unsatisfiable core [2020-07-07 11:03:58,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:03:58,897 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:03:58,898 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:03:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-07 11:03:59,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:03:59,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-07-07 11:03:59,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179759277] [2020-07-07 11:03:59,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-07-07 11:03:59,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:03:59,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-07-07 11:03:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 11:03:59,592 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 81 states. [2020-07-07 11:04:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:04:27,087 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2020-07-07 11:04:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-07-07 11:04:27,090 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 267 [2020-07-07 11:04:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:04:27,092 INFO L225 Difference]: With dead ends: 246 [2020-07-07 11:04:27,092 INFO L226 Difference]: Without dead ends: 242 [2020-07-07 11:04:27,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 338 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=458, Invalid=23412, Unknown=0, NotChecked=0, Total=23870 [2020-07-07 11:04:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-07 11:04:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 135. [2020-07-07 11:04:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-07 11:04:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2020-07-07 11:04:27,102 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 267 [2020-07-07 11:04:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:04:27,102 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2020-07-07 11:04:27,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-07-07 11:04:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2020-07-07 11:04:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-07-07 11:04:27,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:04:27,104 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:04:27,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-07 11:04:27,318 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:04:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:04:27,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1208226657, now seen corresponding path program 18 times [2020-07-07 11:04:27,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:04:27,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110010956] [2020-07-07 11:04:27,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:04:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:04:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-07-07 11:04:42,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110010956] [2020-07-07 11:04:42,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377038992] [2020-07-07 11:04:42,878 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:04:42,988 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-07 11:04:42,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:04:42,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 236 conjunts are in the unsatisfiable core [2020-07-07 11:04:42,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:05:11,338 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:05:11,339 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:05:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-07-07 11:05:12,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:05:12,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 158 [2020-07-07 11:05:12,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535505703] [2020-07-07 11:05:12,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2020-07-07 11:05:12,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:05:12,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2020-07-07 11:05:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=24416, Unknown=0, NotChecked=0, Total=24806 [2020-07-07 11:05:12,379 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 158 states. [2020-07-07 11:06:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:06:03,777 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-07-07 11:06:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-07-07 11:06:03,777 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 274 [2020-07-07 11:06:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:06:03,780 INFO L225 Difference]: With dead ends: 252 [2020-07-07 11:06:03,780 INFO L226 Difference]: Without dead ends: 248 [2020-07-07 11:06:03,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6005 ImplicationChecksByTransitivity, 69.2s TimeCoverageRelationStatistics Valid=770, Invalid=53752, Unknown=0, NotChecked=0, Total=54522 [2020-07-07 11:06:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-07 11:06:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 138. [2020-07-07 11:06:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-07 11:06:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-07-07 11:06:03,790 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 274 [2020-07-07 11:06:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:06:03,790 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-07-07 11:06:03,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 158 states. [2020-07-07 11:06:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-07-07 11:06:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-07-07 11:06:03,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:06:03,793 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:06:04,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-07-07 11:06:04,007 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:06:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:06:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash -591647904, now seen corresponding path program 19 times [2020-07-07 11:06:04,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:06:04,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213367013] [2020-07-07 11:06:04,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:06:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-07-07 11:06:24,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213367013] [2020-07-07 11:06:24,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851909994] [2020-07-07 11:06:24,469 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:06:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:06:24,590 WARN L262 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 320 conjunts are in the unsatisfiable core [2020-07-07 11:06:24,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:06:25,117 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:06:25,118 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:06:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-07-07 11:06:26,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:06:26,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-07-07 11:06:26,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938799734] [2020-07-07 11:06:26,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-07 11:06:26,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:06:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-07 11:06:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 11:06:26,145 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 85 states. [2020-07-07 11:07:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:07:02,882 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-07-07 11:07:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-07 11:07:02,891 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 281 [2020-07-07 11:07:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:07:02,894 INFO L225 Difference]: With dead ends: 258 [2020-07-07 11:07:02,894 INFO L226 Difference]: Without dead ends: 254 [2020-07-07 11:07:02,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 356 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=482, Invalid=25924, Unknown=0, NotChecked=0, Total=26406 [2020-07-07 11:07:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-07-07 11:07:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 141. [2020-07-07 11:07:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-07 11:07:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-07-07 11:07:02,904 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 281 [2020-07-07 11:07:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:07:02,904 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-07-07 11:07:02,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-07 11:07:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-07-07 11:07:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-07-07 11:07:02,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:07:02,906 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:07:03,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-07-07 11:07:03,109 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:07:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:07:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash -504033089, now seen corresponding path program 19 times [2020-07-07 11:07:03,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:07:03,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781178303] [2020-07-07 11:07:03,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:07:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-07-07 11:07:24,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781178303] [2020-07-07 11:07:24,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805261924] [2020-07-07 11:07:24,505 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:07:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:07:24,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 248 conjunts are in the unsatisfiable core [2020-07-07 11:07:24,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:08:05,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:08:05,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-07 11:08:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-07-07 11:08:06,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:08:06,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 166 [2020-07-07 11:08:06,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088381671] [2020-07-07 11:08:06,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2020-07-07 11:08:06,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:08:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2020-07-07 11:08:06,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=26980, Unknown=0, NotChecked=0, Total=27390 [2020-07-07 11:08:06,891 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 166 states. [2020-07-07 11:09:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:09:16,937 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2020-07-07 11:09:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-07 11:09:16,937 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 288 [2020-07-07 11:09:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:09:16,939 INFO L225 Difference]: With dead ends: 264 [2020-07-07 11:09:16,939 INFO L226 Difference]: Without dead ends: 260 [2020-07-07 11:09:16,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6641 ImplicationChecksByTransitivity, 97.7s TimeCoverageRelationStatistics Valid=810, Invalid=59460, Unknown=0, NotChecked=0, Total=60270 [2020-07-07 11:09:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-07 11:09:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 144. [2020-07-07 11:09:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-07 11:09:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-07-07 11:09:16,950 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 288 [2020-07-07 11:09:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:09:16,950 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-07-07 11:09:16,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 166 states. [2020-07-07 11:09:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-07-07 11:09:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-07-07 11:09:16,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:09:16,953 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:09:17,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:09:17,167 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:09:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:09:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1090458620, now seen corresponding path program 20 times [2020-07-07 11:09:17,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:09:17,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093304426] [2020-07-07 11:09:17,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:09:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:17,400 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 13 [2020-07-07 11:09:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:09:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-07-07 11:09:44,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093304426] [2020-07-07 11:09:44,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032745383] [2020-07-07 11:09:44,143 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:09:44,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:09:44,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:09:44,253 WARN L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 336 conjunts are in the unsatisfiable core [2020-07-07 11:09:44,258 INFO L287 TraceCheckSpWp]: Computing forward predicates...