/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/reducercommutativity/max20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:10:21,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:10:21,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:10:21,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:10:21,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:10:21,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:10:21,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:10:21,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:10:21,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:10:21,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:10:21,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:10:21,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:10:21,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:10:21,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:10:21,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:10:21,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:10:21,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:10:21,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:10:21,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:10:21,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:10:21,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:10:21,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:10:21,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:10:21,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:10:21,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:10:21,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:10:21,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:10:21,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:10:21,115 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 [2019-11-06 22:10:21,129 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:10:21,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:10:21,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:10:21,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:10:21,131 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:10:21,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:10:21,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:10:21,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:10:21,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:10:21,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:10:21,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:10:21,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:10:21,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:10:21,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:10:21,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:10:21,133 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:10:21,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:10:21,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:10:21,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:10:21,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:10:21,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:10:21,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:10:21,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:10:21,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:10:21,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:10:21,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:10:21,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:10:21,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:10:21,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:10:21,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:10:21,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:10:21,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:10:21,471 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:10:21,471 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:10:21,472 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max20-1.i [2019-11-06 22:10:21,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771da286f/7cc2561e32d84438a32f3d08945118d1/FLAGe15101bd9 [2019-11-06 22:10:22,035 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:10:22,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max20-1.i [2019-11-06 22:10:22,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771da286f/7cc2561e32d84438a32f3d08945118d1/FLAGe15101bd9 [2019-11-06 22:10:22,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771da286f/7cc2561e32d84438a32f3d08945118d1 [2019-11-06 22:10:22,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:10:22,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:10:22,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:10:22,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:10:22,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:10:22,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10041329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22, skipping insertion in model container [2019-11-06 22:10:22,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,394 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:10:22,410 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:10:22,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:10:22,610 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:10:22,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:10:22,648 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:10:22,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22 WrapperNode [2019-11-06 22:10:22,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:10:22,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:10:22,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:10:22,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:10:22,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (1/1) ... [2019-11-06 22:10:22,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:10:22,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:10:22,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:10:22,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:10:22,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (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 [2019-11-06 22:10:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:10:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:10:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-11-06 22:10:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:10:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:10:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:10:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-11-06 22:10:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:10:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:10:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:10:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:10:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:10:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:10:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:10:23,126 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:10:23,127 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:10:23,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:23 BoogieIcfgContainer [2019-11-06 22:10:23,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:10:23,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:10:23,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:10:23,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:10:23,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:22" (1/3) ... [2019-11-06 22:10:23,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e9ff65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:23, skipping insertion in model container [2019-11-06 22:10:23,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:22" (2/3) ... [2019-11-06 22:10:23,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e9ff65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:23, skipping insertion in model container [2019-11-06 22:10:23,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:23" (3/3) ... [2019-11-06 22:10:23,148 INFO L109 eAbstractionObserver]: Analyzing ICFG max20-1.i [2019-11-06 22:10:23,168 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:10:23,190 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:10:23,211 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:10:23,245 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:10:23,245 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:10:23,245 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:10:23,246 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:10:23,246 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:10:23,246 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:10:23,246 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:10:23,246 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:10:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-06 22:10:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:10:23,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:23,277 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:23,279 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:23,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1379671032, now seen corresponding path program 1 times [2019-11-06 22:10:23,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:23,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543746404] [2019-11-06 22:10:23,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:10:23,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543746404] [2019-11-06 22:10:23,543 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:10:23,543 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:10:23,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295389174] [2019-11-06 22:10:23,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:10:23,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:10:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:23,578 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-11-06 22:10:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:23,762 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-11-06 22:10:23,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:10:23,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-06 22:10:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:23,776 INFO L225 Difference]: With dead ends: 60 [2019-11-06 22:10:23,776 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 22:10:23,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 22:10:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 22:10:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:10:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 22:10:23,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2019-11-06 22:10:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:23,823 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 22:10:23,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:10:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 22:10:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:10:23,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:23,827 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:23,827 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash 551744077, now seen corresponding path program 1 times [2019-11-06 22:10:23,828 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:23,829 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796027033] [2019-11-06 22:10:23,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:10:23,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796027033] [2019-11-06 22:10:23,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215869004] [2019-11-06 22:10:23,975 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 [2019-11-06 22:10:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:10:24,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:10:24,099 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:24,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:10:24,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107493927] [2019-11-06 22:10:24,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:10:24,103 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:10:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:24,104 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-11-06 22:10:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:24,140 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2019-11-06 22:10:24,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:10:24,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:10:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:24,143 INFO L225 Difference]: With dead ends: 52 [2019-11-06 22:10:24,143 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 22:10:24,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 22:10:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-06 22:10:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 22:10:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-06 22:10:24,165 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2019-11-06 22:10:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:24,165 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-06 22:10:24,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:10:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-06 22:10:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:10:24,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:24,170 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:24,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:24,376 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:24,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:24,376 INFO L82 PathProgramCache]: Analyzing trace with hash 727331048, now seen corresponding path program 1 times [2019-11-06 22:10:24,377 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:24,377 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178068692] [2019-11-06 22:10:24,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:24,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178068692] [2019-11-06 22:10:24,560 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:10:24,562 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:10:24,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452421196] [2019-11-06 22:10:24,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:10:24,564 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:24,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:10:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:24,564 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2019-11-06 22:10:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:24,685 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-11-06 22:10:24,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:10:24,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-11-06 22:10:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:24,687 INFO L225 Difference]: With dead ends: 47 [2019-11-06 22:10:24,687 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 22:10:24,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 22:10:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-06 22:10:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 22:10:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-06 22:10:24,694 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2019-11-06 22:10:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:24,697 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-06 22:10:24,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:10:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-06 22:10:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 22:10:24,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:24,699 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:24,699 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -270429754, now seen corresponding path program 1 times [2019-11-06 22:10:24,700 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:24,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522423161] [2019-11-06 22:10:24,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:24,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522423161] [2019-11-06 22:10:24,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265913152] [2019-11-06 22:10:24,806 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 [2019-11-06 22:10:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:24,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:24,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:24,917 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:24,918 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 22:10:24,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396607791] [2019-11-06 22:10:24,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:10:24,919 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:10:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:24,920 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-11-06 22:10:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:25,035 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-06 22:10:25,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:10:25,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2019-11-06 22:10:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:25,037 INFO L225 Difference]: With dead ends: 56 [2019-11-06 22:10:25,037 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 22:10:25,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 22:10:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-06 22:10:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 22:10:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-06 22:10:25,045 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 48 [2019-11-06 22:10:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:25,046 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-06 22:10:25,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:10:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-06 22:10:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:10:25,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:25,051 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:25,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:25,255 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1585951496, now seen corresponding path program 2 times [2019-11-06 22:10:25,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:25,256 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424966374] [2019-11-06 22:10:25,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:25,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424966374] [2019-11-06 22:10:25,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659607124] [2019-11-06 22:10:25,413 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 [2019-11-06 22:10:25,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:25,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:25,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:25,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:25,518 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:25,518 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:10:25,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112815710] [2019-11-06 22:10:25,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:10:25,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:25,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:10:25,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:25,522 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-11-06 22:10:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:25,621 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-11-06 22:10:25,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:10:25,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 22:10:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:25,624 INFO L225 Difference]: With dead ends: 58 [2019-11-06 22:10:25,625 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 22:10:25,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 22:10:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 22:10:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 22:10:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-06 22:10:25,638 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 50 [2019-11-06 22:10:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:25,639 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-06 22:10:25,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:10:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-06 22:10:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:10:25,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:25,640 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:25,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:25,842 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:25,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1138062390, now seen corresponding path program 3 times [2019-11-06 22:10:25,843 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:25,843 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461880154] [2019-11-06 22:10:25,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:10:25,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461880154] [2019-11-06 22:10:25,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82217988] [2019-11-06 22:10:25,980 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 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 [2019-11-06 22:10:26,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 22:10:26,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:26,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:26,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 22:10:26,093 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:26,093 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:10:26,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032042425] [2019-11-06 22:10:26,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:10:26,094 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:26,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:10:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:26,095 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2019-11-06 22:10:26,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:26,259 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2019-11-06 22:10:26,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:10:26,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 22:10:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:26,261 INFO L225 Difference]: With dead ends: 67 [2019-11-06 22:10:26,261 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 22:10:26,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:10:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 22:10:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-11-06 22:10:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 22:10:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-06 22:10:26,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 52 [2019-11-06 22:10:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:26,278 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-06 22:10:26,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:10:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-06 22:10:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 22:10:26,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:26,282 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:26,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:26,487 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash 454933031, now seen corresponding path program 4 times [2019-11-06 22:10:26,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:26,488 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729319247] [2019-11-06 22:10:26,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 22:10:26,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729319247] [2019-11-06 22:10:26,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514479669] [2019-11-06 22:10:26,601 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 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 [2019-11-06 22:10:26,675 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:26,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:26,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:26,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 22:10:26,711 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:26,711 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 22:10:26,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424336873] [2019-11-06 22:10:26,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:10:26,713 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:26,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:10:26,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:26,714 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2019-11-06 22:10:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:26,845 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-11-06 22:10:26,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:10:26,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2019-11-06 22:10:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:26,846 INFO L225 Difference]: With dead ends: 70 [2019-11-06 22:10:26,846 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 22:10:26,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 22:10:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-11-06 22:10:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 22:10:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-11-06 22:10:26,863 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 66 [2019-11-06 22:10:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:26,864 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-11-06 22:10:26,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:10:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-11-06 22:10:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 22:10:26,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:26,866 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:27,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:27,068 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1758121705, now seen corresponding path program 5 times [2019-11-06 22:10:27,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:27,069 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466409881] [2019-11-06 22:10:27,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 22:10:27,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466409881] [2019-11-06 22:10:27,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045779028] [2019-11-06 22:10:27,190 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 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 [2019-11-06 22:10:27,294 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 22:10:27,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:27,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:27,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 22:10:27,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:27,362 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 22:10:27,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635466775] [2019-11-06 22:10:27,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:27,363 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:27,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:27,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:27,364 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 12 states. [2019-11-06 22:10:27,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:27,572 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2019-11-06 22:10:27,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:27,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2019-11-06 22:10:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:27,573 INFO L225 Difference]: With dead ends: 79 [2019-11-06 22:10:27,573 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 22:10:27,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:10:27,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 22:10:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-11-06 22:10:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 22:10:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-11-06 22:10:27,587 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 68 [2019-11-06 22:10:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:27,592 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-11-06 22:10:27,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-11-06 22:10:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 22:10:27,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:27,594 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:27,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:27,803 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1391411910, now seen corresponding path program 6 times [2019-11-06 22:10:27,804 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:27,804 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400072237] [2019-11-06 22:10:27,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 22:10:27,936 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400072237] [2019-11-06 22:10:27,937 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794643460] [2019-11-06 22:10:27,937 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 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 [2019-11-06 22:10:28,028 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 22:10:28,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:28,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:28,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 22:10:28,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:28,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-11-06 22:10:28,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002485635] [2019-11-06 22:10:28,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:28,096 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:28,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:28,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:28,099 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 12 states. [2019-11-06 22:10:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:28,237 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-11-06 22:10:28,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:28,237 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-11-06 22:10:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:28,238 INFO L225 Difference]: With dead ends: 85 [2019-11-06 22:10:28,238 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 22:10:28,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 22:10:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-11-06 22:10:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 22:10:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-06 22:10:28,253 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 82 [2019-11-06 22:10:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:28,253 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-06 22:10:28,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-06 22:10:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 22:10:28,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:28,256 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:28,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:28,470 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash 197997542, now seen corresponding path program 7 times [2019-11-06 22:10:28,471 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:28,471 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766282643] [2019-11-06 22:10:28,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:28,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766282643] [2019-11-06 22:10:28,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645954763] [2019-11-06 22:10:28,614 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 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 [2019-11-06 22:10:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:28,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:10:28,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:28,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:28,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:10:28,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271991227] [2019-11-06 22:10:28,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:28,731 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:28,732 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2019-11-06 22:10:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:28,875 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2019-11-06 22:10:28,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:10:28,875 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-11-06 22:10:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:28,876 INFO L225 Difference]: With dead ends: 88 [2019-11-06 22:10:28,877 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 22:10:28,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 22:10:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-06 22:10:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 22:10:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-11-06 22:10:28,883 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 86 [2019-11-06 22:10:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:28,884 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-11-06 22:10:28,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-11-06 22:10:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:10:28,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:28,886 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:29,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:29,098 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:29,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1074942888, now seen corresponding path program 8 times [2019-11-06 22:10:29,099 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:29,099 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472559464] [2019-11-06 22:10:29,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:29,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472559464] [2019-11-06 22:10:29,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991316191] [2019-11-06 22:10:29,229 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 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 [2019-11-06 22:10:29,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:29,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:29,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:10:29,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:29,354 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:29,354 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:10:29,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537875336] [2019-11-06 22:10:29,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:10:29,356 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:29,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:10:29,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:29,356 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 13 states. [2019-11-06 22:10:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:29,469 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-11-06 22:10:29,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:29,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-11-06 22:10:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:29,471 INFO L225 Difference]: With dead ends: 90 [2019-11-06 22:10:29,471 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 22:10:29,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 22:10:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-06 22:10:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 22:10:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-11-06 22:10:29,477 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 88 [2019-11-06 22:10:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:29,477 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-11-06 22:10:29,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:10:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-11-06 22:10:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:10:29,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:29,479 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:29,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:29,689 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2005830378, now seen corresponding path program 9 times [2019-11-06 22:10:29,689 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:29,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197597455] [2019-11-06 22:10:29,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 22:10:29,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197597455] [2019-11-06 22:10:29,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074016348] [2019-11-06 22:10:29,894 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 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 [2019-11-06 22:10:29,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 22:10:29,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:29,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:29,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 94 proven. 4 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-11-06 22:10:30,017 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:30,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 22:10:30,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014401941] [2019-11-06 22:10:30,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:10:30,022 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:10:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:10:30,025 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 16 states. [2019-11-06 22:10:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:30,218 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2019-11-06 22:10:30,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:10:30,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-11-06 22:10:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:30,219 INFO L225 Difference]: With dead ends: 95 [2019-11-06 22:10:30,219 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 22:10:30,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:10:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 22:10:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 22:10:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 22:10:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2019-11-06 22:10:30,229 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 90 [2019-11-06 22:10:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:30,229 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2019-11-06 22:10:30,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:10:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2019-11-06 22:10:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:10:30,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:30,231 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:30,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:30,435 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1656201482, now seen corresponding path program 10 times [2019-11-06 22:10:30,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:30,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415761777] [2019-11-06 22:10:30,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 22:10:30,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415761777] [2019-11-06 22:10:30,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284485136] [2019-11-06 22:10:30,591 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 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 [2019-11-06 22:10:30,667 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:30,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:30,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:10:30,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 22:10:30,695 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:30,695 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 22:10:30,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148700453] [2019-11-06 22:10:30,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 22:10:30,696 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 22:10:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:10:30,697 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2019-11-06 22:10:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:30,858 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2019-11-06 22:10:30,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:10:30,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2019-11-06 22:10:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:30,860 INFO L225 Difference]: With dead ends: 98 [2019-11-06 22:10:30,860 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 22:10:30,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:10:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 22:10:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-06 22:10:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-06 22:10:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-11-06 22:10:30,865 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 94 [2019-11-06 22:10:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:30,866 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-11-06 22:10:30,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 22:10:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-11-06 22:10:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 22:10:30,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:30,867 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:31,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:31,068 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash 659152588, now seen corresponding path program 11 times [2019-11-06 22:10:31,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:31,070 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236050117] [2019-11-06 22:10:31,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 22:10:31,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236050117] [2019-11-06 22:10:31,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725391438] [2019-11-06 22:10:31,250 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 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 [2019-11-06 22:10:31,468 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-06 22:10:31,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:31,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:31,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 88 proven. 15 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-11-06 22:10:31,543 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:31,543 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-11-06 22:10:31,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676548740] [2019-11-06 22:10:31,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:10:31,544 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:10:31,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:31,545 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 19 states. [2019-11-06 22:10:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:31,765 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2019-11-06 22:10:31,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:10:31,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-11-06 22:10:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:31,766 INFO L225 Difference]: With dead ends: 107 [2019-11-06 22:10:31,767 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 22:10:31,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:10:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 22:10:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2019-11-06 22:10:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 22:10:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-11-06 22:10:31,774 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 96 [2019-11-06 22:10:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:31,774 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-11-06 22:10:31,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:10:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-11-06 22:10:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:10:31,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:31,775 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:31,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:31,980 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1708395305, now seen corresponding path program 12 times [2019-11-06 22:10:31,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:31,981 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357738704] [2019-11-06 22:10:31,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-06 22:10:32,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357738704] [2019-11-06 22:10:32,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443318791] [2019-11-06 22:10:32,174 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 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 [2019-11-06 22:10:32,341 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:10:32,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:32,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:32,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 154 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-11-06 22:10:32,411 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:32,411 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 22:10:32,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61056991] [2019-11-06 22:10:32,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 22:10:32,412 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:32,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 22:10:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:10:32,413 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 20 states. [2019-11-06 22:10:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:32,623 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-11-06 22:10:32,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:10:32,624 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2019-11-06 22:10:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:32,625 INFO L225 Difference]: With dead ends: 113 [2019-11-06 22:10:32,625 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 22:10:32,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:10:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 22:10:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-11-06 22:10:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 22:10:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2019-11-06 22:10:32,630 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 110 [2019-11-06 22:10:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:32,631 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2019-11-06 22:10:32,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 22:10:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2019-11-06 22:10:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:10:32,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:32,632 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:32,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:32,836 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash -356697015, now seen corresponding path program 13 times [2019-11-06 22:10:32,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:32,838 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809902591] [2019-11-06 22:10:32,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:33,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809902591] [2019-11-06 22:10:33,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797714517] [2019-11-06 22:10:33,037 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 [2019-11-06 22:10:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 22:10:33,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:33,163 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:33,163 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 22:10:33,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710440699] [2019-11-06 22:10:33,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 22:10:33,164 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:33,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 22:10:33,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:10:33,165 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 18 states. [2019-11-06 22:10:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:33,377 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2019-11-06 22:10:33,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:10:33,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2019-11-06 22:10:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:33,378 INFO L225 Difference]: With dead ends: 116 [2019-11-06 22:10:33,378 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 22:10:33,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:10:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 22:10:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-06 22:10:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:10:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2019-11-06 22:10:33,384 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 114 [2019-11-06 22:10:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:33,384 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2019-11-06 22:10:33,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 22:10:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2019-11-06 22:10:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:10:33,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:33,386 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:33,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:33,590 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:33,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1330051829, now seen corresponding path program 14 times [2019-11-06 22:10:33,591 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:33,591 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906690022] [2019-11-06 22:10:33,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:33,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906690022] [2019-11-06 22:10:33,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833565146] [2019-11-06 22:10:33,805 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 [2019-11-06 22:10:33,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:33,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:33,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:10:33,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:33,919 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:33,919 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 22:10:33,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978060884] [2019-11-06 22:10:33,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:10:33,920 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:33,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:10:33,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:33,921 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 19 states. [2019-11-06 22:10:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:34,045 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2019-11-06 22:10:34,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 22:10:34,045 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 116 [2019-11-06 22:10:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:34,046 INFO L225 Difference]: With dead ends: 118 [2019-11-06 22:10:34,046 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 22:10:34,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:10:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 22:10:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-06 22:10:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 22:10:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-11-06 22:10:34,051 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 116 [2019-11-06 22:10:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:34,051 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-11-06 22:10:34,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:10:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-11-06 22:10:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 22:10:34,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:34,053 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:34,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:34,257 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:34,258 INFO L82 PathProgramCache]: Analyzing trace with hash -421157555, now seen corresponding path program 15 times [2019-11-06 22:10:34,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:34,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233505426] [2019-11-06 22:10:34,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-06 22:10:34,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233505426] [2019-11-06 22:10:34,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931616715] [2019-11-06 22:10:34,603 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 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 [2019-11-06 22:10:34,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 22:10:34,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:34,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:34,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 152 proven. 28 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-06 22:10:34,863 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:34,864 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 22:10:34,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349166333] [2019-11-06 22:10:34,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 22:10:34,865 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 22:10:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:34,866 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 24 states. [2019-11-06 22:10:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:35,324 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2019-11-06 22:10:35,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 22:10:35,325 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2019-11-06 22:10:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:35,326 INFO L225 Difference]: With dead ends: 127 [2019-11-06 22:10:35,326 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 22:10:35,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2019-11-06 22:10:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 22:10:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2019-11-06 22:10:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 22:10:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-11-06 22:10:35,334 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 118 [2019-11-06 22:10:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:35,334 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-11-06 22:10:35,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 22:10:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-11-06 22:10:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:10:35,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:35,338 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:35,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:35,544 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1792802646, now seen corresponding path program 16 times [2019-11-06 22:10:35,545 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:35,546 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828371811] [2019-11-06 22:10:35,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 22:10:35,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828371811] [2019-11-06 22:10:35,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581890835] [2019-11-06 22:10:35,871 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 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 [2019-11-06 22:10:35,994 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:35,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:35,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:10:36,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 22:10:36,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:36,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 22:10:36,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808076679] [2019-11-06 22:10:36,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:10:36,056 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:10:36,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:36,057 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 21 states. [2019-11-06 22:10:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:36,258 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2019-11-06 22:10:36,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:10:36,258 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 132 [2019-11-06 22:10:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:36,259 INFO L225 Difference]: With dead ends: 130 [2019-11-06 22:10:36,259 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 22:10:36,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 22:10:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-06 22:10:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-06 22:10:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-11-06 22:10:36,263 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 132 [2019-11-06 22:10:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:36,263 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-11-06 22:10:36,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:10:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-11-06 22:10:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:10:36,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:36,266 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:36,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:36,467 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:36,468 INFO L82 PathProgramCache]: Analyzing trace with hash -371467028, now seen corresponding path program 17 times [2019-11-06 22:10:36,468 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:36,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725060850] [2019-11-06 22:10:36,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 22:10:36,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725060850] [2019-11-06 22:10:36,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557156248] [2019-11-06 22:10:36,740 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 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 [2019-11-06 22:10:37,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 22:10:37,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:37,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:10:37,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 224 proven. 45 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2019-11-06 22:10:37,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:37,422 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-06 22:10:37,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177808007] [2019-11-06 22:10:37,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:10:37,425 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:10:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:37,426 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 27 states. [2019-11-06 22:10:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:37,793 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2019-11-06 22:10:37,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 22:10:37,794 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2019-11-06 22:10:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:37,794 INFO L225 Difference]: With dead ends: 139 [2019-11-06 22:10:37,795 INFO L226 Difference]: Without dead ends: 95 [2019-11-06 22:10:37,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 22:10:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-06 22:10:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2019-11-06 22:10:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 22:10:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-11-06 22:10:37,801 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-11-06 22:10:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:37,801 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-11-06 22:10:37,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:10:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-11-06 22:10:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:10:37,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:37,802 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:38,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:38,008 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1660813879, now seen corresponding path program 18 times [2019-11-06 22:10:38,009 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:38,010 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745593241] [2019-11-06 22:10:38,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-11-06 22:10:38,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745593241] [2019-11-06 22:10:38,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076298013] [2019-11-06 22:10:38,289 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 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 [2019-11-06 22:10:38,554 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-06 22:10:38,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:38,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:38,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 322 proven. 16 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2019-11-06 22:10:38,642 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:38,642 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-11-06 22:10:38,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261410537] [2019-11-06 22:10:38,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:10:38,643 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:38,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:10:38,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:38,644 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 27 states. [2019-11-06 22:10:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:38,894 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2019-11-06 22:10:38,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 22:10:38,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2019-11-06 22:10:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:38,895 INFO L225 Difference]: With dead ends: 145 [2019-11-06 22:10:38,895 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 22:10:38,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 22:10:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 22:10:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 22:10:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2019-11-06 22:10:38,902 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 148 [2019-11-06 22:10:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:38,903 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2019-11-06 22:10:38,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:10:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2019-11-06 22:10:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:10:38,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:38,904 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:39,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:39,108 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash -462803735, now seen corresponding path program 19 times [2019-11-06 22:10:39,109 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:39,109 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909762459] [2019-11-06 22:10:39,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-06 22:10:39,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909762459] [2019-11-06 22:10:39,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508833281] [2019-11-06 22:10:39,419 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 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 [2019-11-06 22:10:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:39,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 22:10:39,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-06 22:10:39,578 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:39,578 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 22:10:39,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511801207] [2019-11-06 22:10:39,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 22:10:39,579 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 22:10:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:39,580 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 24 states. [2019-11-06 22:10:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:39,750 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2019-11-06 22:10:39,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 22:10:39,762 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 152 [2019-11-06 22:10:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:39,763 INFO L225 Difference]: With dead ends: 147 [2019-11-06 22:10:39,763 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 22:10:39,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 22:10:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 22:10:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-11-06 22:10:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 22:10:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2019-11-06 22:10:39,772 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 152 [2019-11-06 22:10:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:39,775 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2019-11-06 22:10:39,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 22:10:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2019-11-06 22:10:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:10:39,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:39,776 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:39,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:39,982 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1779127339, now seen corresponding path program 20 times [2019-11-06 22:10:39,983 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:39,983 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003140515] [2019-11-06 22:10:39,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 320 proven. 66 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-11-06 22:10:40,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003140515] [2019-11-06 22:10:40,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762274422] [2019-11-06 22:10:40,152 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 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 [2019-11-06 22:10:40,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:40,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:40,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:10:40,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-11-06 22:10:40,285 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:40,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-11-06 22:10:40,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463062508] [2019-11-06 22:10:40,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:10:40,286 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:10:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:10:40,287 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 10 states. [2019-11-06 22:10:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:40,470 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2019-11-06 22:10:40,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:10:40,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 154 [2019-11-06 22:10:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:40,471 INFO L225 Difference]: With dead ends: 153 [2019-11-06 22:10:40,472 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 22:10:40,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:10:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 22:10:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-11-06 22:10:40,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 22:10:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2019-11-06 22:10:40,478 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 154 [2019-11-06 22:10:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:40,478 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2019-11-06 22:10:40,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:10:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2019-11-06 22:10:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 22:10:40,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:40,480 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:40,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:40,684 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1900284986, now seen corresponding path program 21 times [2019-11-06 22:10:40,685 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:40,686 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662598845] [2019-11-06 22:10:40,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 428 proven. 91 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2019-11-06 22:10:40,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662598845] [2019-11-06 22:10:40,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509375683] [2019-11-06 22:10:40,868 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 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 [2019-11-06 22:10:41,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-06 22:10:41,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:41,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:10:41,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 430 proven. 25 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2019-11-06 22:10:41,216 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:41,217 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-11-06 22:10:41,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681584078] [2019-11-06 22:10:41,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 22:10:41,218 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 22:10:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:10:41,218 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 17 states. [2019-11-06 22:10:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:41,560 INFO L93 Difference]: Finished difference Result 164 states and 191 transitions. [2019-11-06 22:10:41,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:10:41,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 166 [2019-11-06 22:10:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:41,562 INFO L225 Difference]: With dead ends: 164 [2019-11-06 22:10:41,562 INFO L226 Difference]: Without dead ends: 111 [2019-11-06 22:10:41,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:10:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-06 22:10:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2019-11-06 22:10:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 22:10:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2019-11-06 22:10:41,568 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 166 [2019-11-06 22:10:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:41,568 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2019-11-06 22:10:41,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 22:10:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2019-11-06 22:10:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 22:10:41,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:41,570 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:41,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:41,775 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 614179775, now seen corresponding path program 22 times [2019-11-06 22:10:41,776 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:41,776 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634638446] [2019-11-06 22:10:41,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1627 backedges. 276 proven. 396 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2019-11-06 22:10:41,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634638446] [2019-11-06 22:10:41,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688825928] [2019-11-06 22:10:41,960 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 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 [2019-11-06 22:10:42,091 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:42,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:42,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:10:42,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1627 backedges. 548 proven. 120 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2019-11-06 22:10:42,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:42,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-11-06 22:10:42,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301401476] [2019-11-06 22:10:42,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:10:42,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:42,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:10:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:10:42,124 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 12 states. [2019-11-06 22:10:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:42,371 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2019-11-06 22:10:42,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:42,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 180 [2019-11-06 22:10:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:42,373 INFO L225 Difference]: With dead ends: 173 [2019-11-06 22:10:42,373 INFO L226 Difference]: Without dead ends: 114 [2019-11-06 22:10:42,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-06 22:10:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-11-06 22:10:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-06 22:10:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2019-11-06 22:10:42,379 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 180 [2019-11-06 22:10:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:42,379 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2019-11-06 22:10:42,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:10:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2019-11-06 22:10:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-06 22:10:42,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:42,381 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:42,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:42,582 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash -65754278, now seen corresponding path program 23 times [2019-11-06 22:10:42,582 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:42,582 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669766798] [2019-11-06 22:10:42,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 692 proven. 153 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2019-11-06 22:10:42,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669766798] [2019-11-06 22:10:42,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48257656] [2019-11-06 22:10:42,860 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 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 [2019-11-06 22:10:45,555 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-06 22:10:45,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:45,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:10:45,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 688 proven. 153 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2019-11-06 22:10:45,608 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:45,608 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-11-06 22:10:45,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259678059] [2019-11-06 22:10:45,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:10:45,609 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:10:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:45,610 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 13 states. [2019-11-06 22:10:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:45,897 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2019-11-06 22:10:45,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:10:45,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2019-11-06 22:10:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:45,899 INFO L225 Difference]: With dead ends: 181 [2019-11-06 22:10:45,900 INFO L226 Difference]: Without dead ends: 118 [2019-11-06 22:10:45,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:10:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-06 22:10:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2019-11-06 22:10:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-06 22:10:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2019-11-06 22:10:45,906 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 192 [2019-11-06 22:10:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:45,906 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2019-11-06 22:10:45,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:10:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2019-11-06 22:10:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-11-06 22:10:45,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:45,908 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:46,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:46,115 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:46,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:46,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1833262475, now seen corresponding path program 24 times [2019-11-06 22:10:46,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:46,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947015168] [2019-11-06 22:10:46,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 424 proven. 614 refuted. 0 times theorem prover too weak. 1243 trivial. 0 not checked. [2019-11-06 22:10:46,357 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947015168] [2019-11-06 22:10:46,357 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084878754] [2019-11-06 22:10:46,358 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 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 [2019-11-06 22:10:47,846 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-06 22:10:47,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:47,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:10:47,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-11-06 22:10:47,969 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:47,969 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-11-06 22:10:47,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999387116] [2019-11-06 22:10:47,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 22:10:47,970 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:47,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 22:10:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:10:47,970 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 21 states. [2019-11-06 22:10:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:48,406 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2019-11-06 22:10:48,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 22:10:48,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 204 [2019-11-06 22:10:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:48,408 INFO L225 Difference]: With dead ends: 192 [2019-11-06 22:10:48,408 INFO L226 Difference]: Without dead ends: 125 [2019-11-06 22:10:48,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2019-11-06 22:10:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-06 22:10:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2019-11-06 22:10:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 22:10:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2019-11-06 22:10:48,416 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 204 [2019-11-06 22:10:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:48,416 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2019-11-06 22:10:48,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 22:10:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2019-11-06 22:10:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-06 22:10:48,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:48,418 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:48,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:48,620 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash 368002414, now seen corresponding path program 25 times [2019-11-06 22:10:48,621 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:48,622 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784235712] [2019-11-06 22:10:48,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2019-11-06 22:10:48,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784235712] [2019-11-06 22:10:48,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889133343] [2019-11-06 22:10:48,831 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 [2019-11-06 22:10:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:48,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 22:10:48,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1016 proven. 231 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2019-11-06 22:10:49,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:49,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2019-11-06 22:10:49,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548002464] [2019-11-06 22:10:49,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 22:10:49,142 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 22:10:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:10:49,143 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand 23 states. [2019-11-06 22:10:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:49,625 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2019-11-06 22:10:49,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 22:10:49,625 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 218 [2019-11-06 22:10:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:49,627 INFO L225 Difference]: With dead ends: 204 [2019-11-06 22:10:49,627 INFO L226 Difference]: Without dead ends: 131 [2019-11-06 22:10:49,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 22:10:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-06 22:10:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2019-11-06 22:10:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-06 22:10:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2019-11-06 22:10:49,634 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 218 [2019-11-06 22:10:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:49,635 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2019-11-06 22:10:49,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-06 22:10:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2019-11-06 22:10:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-06 22:10:49,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:49,636 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:49,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:49,841 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1889924505, now seen corresponding path program 26 times [2019-11-06 22:10:49,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:49,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983733897] [2019-11-06 22:10:49,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3107 backedges. 1208 proven. 276 refuted. 0 times theorem prover too weak. 1623 trivial. 0 not checked. [2019-11-06 22:10:50,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983733897] [2019-11-06 22:10:50,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361171719] [2019-11-06 22:10:50,182 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 [2019-11-06 22:10:50,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:50,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:50,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 22:10:50,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3107 backedges. 1204 proven. 276 refuted. 0 times theorem prover too weak. 1627 trivial. 0 not checked. [2019-11-06 22:10:50,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:50,393 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2019-11-06 22:10:50,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361905792] [2019-11-06 22:10:50,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:10:50,394 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:10:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:10:50,395 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 16 states. [2019-11-06 22:10:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:50,767 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2019-11-06 22:10:50,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:10:50,768 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 232 [2019-11-06 22:10:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:50,770 INFO L225 Difference]: With dead ends: 213 [2019-11-06 22:10:50,770 INFO L226 Difference]: Without dead ends: 134 [2019-11-06 22:10:50,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2019-11-06 22:10:50,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-06 22:10:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2019-11-06 22:10:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-06 22:10:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2019-11-06 22:10:50,782 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 232 [2019-11-06 22:10:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:50,783 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2019-11-06 22:10:50,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:10:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2019-11-06 22:10:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-11-06 22:10:50,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:50,785 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:50,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:50,990 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1902191106, now seen corresponding path program 27 times [2019-11-06 22:10:50,991 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:50,991 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50607926] [2019-11-06 22:10:50,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3560 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3496 trivial. 0 not checked. [2019-11-06 22:10:51,247 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50607926] [2019-11-06 22:10:51,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965547190] [2019-11-06 22:10:51,248 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 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 [2019-11-06 22:10:51,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 22:10:51,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:51,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:10:51,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3560 backedges. 1414 proven. 64 refuted. 0 times theorem prover too weak. 2082 trivial. 0 not checked. [2019-11-06 22:10:51,915 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:51,915 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:10:51,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029815043] [2019-11-06 22:10:51,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:10:51,916 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:51,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:10:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:51,916 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand 13 states. [2019-11-06 22:10:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:52,047 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2019-11-06 22:10:52,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:10:52,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 244 [2019-11-06 22:10:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:52,048 INFO L225 Difference]: With dead ends: 197 [2019-11-06 22:10:52,049 INFO L226 Difference]: Without dead ends: 134 [2019-11-06 22:10:52,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:10:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-06 22:10:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-11-06 22:10:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-06 22:10:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2019-11-06 22:10:52,056 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 244 [2019-11-06 22:10:52,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:52,056 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2019-11-06 22:10:52,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:10:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2019-11-06 22:10:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-11-06 22:10:52,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:52,058 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:52,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:52,263 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1123586400, now seen corresponding path program 28 times [2019-11-06 22:10:52,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:52,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568463034] [2019-11-06 22:10:52,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3496 trivial. 0 not checked. [2019-11-06 22:10:52,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568463034] [2019-11-06 22:10:52,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882237040] [2019-11-06 22:10:52,511 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 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 [2019-11-06 22:10:52,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:52,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:52,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 22:10:52,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 1408 proven. 325 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2019-11-06 22:10:52,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:52,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2019-11-06 22:10:52,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149512739] [2019-11-06 22:10:52,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 22:10:52,933 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 22:10:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2019-11-06 22:10:52,934 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand 27 states. [2019-11-06 22:10:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:53,477 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2019-11-06 22:10:53,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 22:10:53,478 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 246 [2019-11-06 22:10:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:53,479 INFO L225 Difference]: With dead ends: 228 [2019-11-06 22:10:53,479 INFO L226 Difference]: Without dead ends: 143 [2019-11-06 22:10:53,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=1215, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 22:10:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-06 22:10:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2019-11-06 22:10:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-06 22:10:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2019-11-06 22:10:53,485 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 246 [2019-11-06 22:10:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:53,486 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2019-11-06 22:10:53,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 22:10:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2019-11-06 22:10:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-11-06 22:10:53,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:53,488 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:53,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:53,689 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1131382183, now seen corresponding path program 29 times [2019-11-06 22:10:53,689 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:53,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132529396] [2019-11-06 22:10:53,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4085 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2019-11-06 22:10:53,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132529396] [2019-11-06 22:10:53,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015051772] [2019-11-06 22:10:53,988 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 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