/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/array-crafted/xor4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:37:06,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:37:06,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:37:06,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:37:06,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:37:06,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:37:06,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:37:06,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:37:06,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:37:06,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:37:06,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:37:06,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:37:06,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:37:06,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:37:06,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:37:06,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:37:06,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:37:06,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:37:06,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:37:06,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:37:06,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:37:06,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:37:06,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:37:06,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:37:06,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:37:06,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:37:06,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:37:06,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:37:06,110 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 18:37:06,123 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:37:06,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:37:06,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:37:06,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:37:06,125 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:37:06,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:37:06,126 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:37:06,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:37:06,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:37:06,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:37:06,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:37:06,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:37:06,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:37:06,127 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:37:06,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:37:06,127 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:37:06,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:37:06,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:37:06,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:37:06,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:37:06,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:37:06,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:37:06,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:37:06,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:37:06,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:37:06,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:37:06,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:37:06,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:37:06,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:37:06,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:37:06,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:37:06,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:37:06,421 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:37:06,421 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:37:06,422 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor4.i [2019-11-06 18:37:06,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250ac5395/d74929f75f1a473bb988db38d28532a7/FLAGb8624b44f [2019-11-06 18:37:06,947 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:37:06,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor4.i [2019-11-06 18:37:06,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250ac5395/d74929f75f1a473bb988db38d28532a7/FLAGb8624b44f [2019-11-06 18:37:07,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250ac5395/d74929f75f1a473bb988db38d28532a7 [2019-11-06 18:37:07,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:37:07,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:37:07,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:07,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:37:07,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:37:07,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11edcc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07, skipping insertion in model container [2019-11-06 18:37:07,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,356 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:37:07,373 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:37:07,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:07,588 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:37:07,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:07,705 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:37:07,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07 WrapperNode [2019-11-06 18:37:07,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:07,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:37:07,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:37:07,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:37:07,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (1/1) ... [2019-11-06 18:37:07,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:37:07,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:37:07,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:37:07,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:37:07,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (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 18:37:07,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:37:07,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:37:07,793 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-11-06 18:37:07,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:37:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:37:07,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:37:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-11-06 18:37:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:37:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:37:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:37:07,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:37:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:37:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:37:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:37:08,063 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:37:08,063 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:37:08,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:08 BoogieIcfgContainer [2019-11-06 18:37:08,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:37:08,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:37:08,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:37:08,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:37:08,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:37:07" (1/3) ... [2019-11-06 18:37:08,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f2db06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:08, skipping insertion in model container [2019-11-06 18:37:08,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:07" (2/3) ... [2019-11-06 18:37:08,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f2db06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:08, skipping insertion in model container [2019-11-06 18:37:08,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:08" (3/3) ... [2019-11-06 18:37:08,082 INFO L109 eAbstractionObserver]: Analyzing ICFG xor4.i [2019-11-06 18:37:08,104 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:37:08,118 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:37:08,137 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:37:08,158 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:37:08,158 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:37:08,158 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:37:08,158 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:37:08,158 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:37:08,158 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:37:08,159 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:37:08,159 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:37:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:37:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:37:08,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:08,180 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 18:37:08,182 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-11-06 18:37:08,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:08,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718836936] [2019-11-06 18:37:08,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,387 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 18:37:08,387 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718836936] [2019-11-06 18:37:08,388 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:08,388 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:37:08,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054439792] [2019-11-06 18:37:08,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:08,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:08,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:37:08,412 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:37:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:08,541 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:37:08,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:08,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:37:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:08,553 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:37:08,553 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:37:08,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:37:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:37:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:37:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:37:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:37:08,596 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:37:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:08,597 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:37:08,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:37:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:37:08,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:08,600 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 18:37:08,601 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:08,601 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-11-06 18:37:08,602 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:08,602 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560475591] [2019-11-06 18:37:08,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:37:08,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560475591] [2019-11-06 18:37:08,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591455248] [2019-11-06 18:37:08,766 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 18:37:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:37:08,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:08,918 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 18:37:08,918 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:37:08,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:37:08,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487862798] [2019-11-06 18:37:08,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:08,924 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:37:08,925 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:37:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:08,946 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:37:08,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:08,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:37:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:08,947 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:37:08,948 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:37:08,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:37:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:37:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:37:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:37:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:37:08,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:37:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:08,967 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:37:08,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:37:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:37:08,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:08,971 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 18:37:09,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:09,174 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:09,175 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-11-06 18:37:09,175 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:09,175 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97769983] [2019-11-06 18:37:09,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,300 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 18:37:09,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97769983] [2019-11-06 18:37:09,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782812107] [2019-11-06 18:37:09,301 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 18:37:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:37:09,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:09,406 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 18:37:09,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:37:09,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:37:09,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963244683] [2019-11-06 18:37:09,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:09,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:09,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:37:09,409 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:37:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:09,432 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:37:09,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:09,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:37:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:09,434 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:37:09,434 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:37:09,434 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 18:37:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:37:09,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:37:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:37:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:37:09,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:37:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:09,441 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:37:09,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:37:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:37:09,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:09,443 INFO L410 BasicCegarLoop]: trace histogram [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 18:37:09,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:09,651 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-11-06 18:37:09,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:09,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222667099] [2019-11-06 18:37:09,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:37:09,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222667099] [2019-11-06 18:37:09,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208820749] [2019-11-06 18:37:09,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:37:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:37:09,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:37:09,875 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:37:09,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:37:09,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126211847] [2019-11-06 18:37:09,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:09,876 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:09,877 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:37:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:09,892 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:37:09,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:09,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:37:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:09,894 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:37:09,894 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:37:09,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:37:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:37:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:37:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:37:09,901 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:37:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:09,903 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:37:09,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:37:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:37:09,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:09,904 INFO L410 BasicCegarLoop]: trace histogram [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 18:37:10,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:10,108 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-11-06 18:37:10,109 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:10,109 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332377274] [2019-11-06 18:37:10,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:37:10,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332377274] [2019-11-06 18:37:10,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665573906] [2019-11-06 18:37:10,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:37:10,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:37:10,304 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:10,304 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:37:10,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449973671] [2019-11-06 18:37:10,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:37:10,306 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:10,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:37:10,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:37:10,310 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:37:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:10,442 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:37:10,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:37:10,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:37:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:10,445 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:37:10,445 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:37:10,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:37:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:37:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:37:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:37:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:37:10,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:37:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:10,456 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:37:10,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:37:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:37:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:37:10,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:10,460 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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 18:37:10,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:10,666 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 2 times [2019-11-06 18:37:10,667 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:10,667 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693060040] [2019-11-06 18:37:10,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:37:10,777 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693060040] [2019-11-06 18:37:10,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463685046] [2019-11-06 18:37:10,778 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 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 18:37:10,839 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:10,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:10,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:10,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:37:10,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:10,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:37:10,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148995912] [2019-11-06 18:37:10,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:37:10,871 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:37:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:10,871 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:37:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:10,955 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:37:10,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:37:10,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:37:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:10,957 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:37:10,957 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:37:10,958 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 18:37:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:37:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:37:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:37:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:37:10,964 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:37:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:10,965 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:37:10,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:37:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:37:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:37:10,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:10,966 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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 18:37:11,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:11,169 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-11-06 18:37:11,172 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:11,172 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831623802] [2019-11-06 18:37:11,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:37:11,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831623802] [2019-11-06 18:37:11,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894337804] [2019-11-06 18:37:11,315 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:11,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:37:11,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:11,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:37:11,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:37:11,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:11,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:37:11,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401171191] [2019-11-06 18:37:11,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:37:11,426 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:37:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:37:11,427 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:37:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:11,530 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:37:11,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:37:11,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:37:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:11,532 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:37:11,532 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:37:11,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:37:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:37:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:37:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:37:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:37:11,539 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:37:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:11,539 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:37:11,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:37:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:37:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:37:11,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:11,540 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 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 18:37:11,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:11,742 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1804278027, now seen corresponding path program 4 times [2019-11-06 18:37:11,743 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:11,743 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977602650] [2019-11-06 18:37:11,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:37:11,829 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977602650] [2019-11-06 18:37:11,829 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721317087] [2019-11-06 18:37:11,829 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:11,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:11,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:11,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:37:11,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:37:11,922 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:11,922 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:37:11,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827105926] [2019-11-06 18:37:11,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:37:11,923 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:37:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:37:11,924 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:37:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:12,031 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:37:12,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:37:12,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:37:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:12,032 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:37:12,032 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:37:12,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 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 18:37:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:37:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:37:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:37:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:37:12,039 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:37:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:12,039 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:37:12,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:37:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:37:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:37:12,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:12,041 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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 18:37:12,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:12,242 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:12,242 INFO L82 PathProgramCache]: Analyzing trace with hash 907456365, now seen corresponding path program 5 times [2019-11-06 18:37:12,243 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:12,243 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981362069] [2019-11-06 18:37:12,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:37:12,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981362069] [2019-11-06 18:37:12,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176493846] [2019-11-06 18:37:12,376 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 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 18:37:12,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:37:12,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:12,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:12,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:37:12,501 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:12,501 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:37:12,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265700794] [2019-11-06 18:37:12,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:37:12,502 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:12,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:37:12,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:37:12,503 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:37:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:12,681 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:37:12,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:37:12,681 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:37:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:12,682 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:37:12,682 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:37:12,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 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 18:37:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:37:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:37:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:37:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:37:12,689 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:37:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:12,689 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:37:12,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:37:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:37:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:37:12,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:12,691 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 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 18:37:12,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:12,895 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1617233875, now seen corresponding path program 6 times [2019-11-06 18:37:12,897 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:12,897 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983453661] [2019-11-06 18:37:12,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:37:13,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983453661] [2019-11-06 18:37:13,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112105921] [2019-11-06 18:37:13,008 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 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 18:37:13,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:37:13,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:13,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:37:13,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:37:13,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:13,141 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:37:13,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589589201] [2019-11-06 18:37:13,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:37:13,142 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:37:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:37:13,143 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:37:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:13,325 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:37:13,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:37:13,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:37:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:13,326 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:37:13,327 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:37:13,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:37:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:37:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:37:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:37:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:37:13,337 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:37:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:13,337 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:37:13,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:37:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:37:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:37:13,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:13,341 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 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 18:37:13,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:13,543 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:13,544 INFO L82 PathProgramCache]: Analyzing trace with hash 592539373, now seen corresponding path program 7 times [2019-11-06 18:37:13,544 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:13,544 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058693254] [2019-11-06 18:37:13,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:13,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058693254] [2019-11-06 18:37:13,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916439675] [2019-11-06 18:37:13,653 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 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 18:37:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:37:13,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:13,755 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:13,755 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:37:13,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9513189] [2019-11-06 18:37:13,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:37:13,756 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:37:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:37:13,757 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:37:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:13,844 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:37:13,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:37:13,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:37:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:13,846 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:37:13,846 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:37:13,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 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 18:37:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:37:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:37:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:37:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:37:13,852 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:37:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:13,853 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:37:13,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:37:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:37:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:37:13,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:13,854 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 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 18:37:14,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:14,058 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:14,059 INFO L82 PathProgramCache]: Analyzing trace with hash 295497935, now seen corresponding path program 8 times [2019-11-06 18:37:14,059 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:14,059 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004355506] [2019-11-06 18:37:14,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:14,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004355506] [2019-11-06 18:37:14,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324809545] [2019-11-06 18:37:14,198 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 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 18:37:14,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:14,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:14,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:37:14,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:14,283 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:14,283 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:37:14,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635860112] [2019-11-06 18:37:14,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:37:14,284 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:37:14,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:37:14,285 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:37:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:14,393 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:37:14,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:37:14,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:37:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:14,394 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:37:14,394 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:37:14,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 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 18:37:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:37:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:37:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:37:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:37:14,401 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:37:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:14,401 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:37:14,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:37:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:37:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:37:14,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:14,402 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 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 18:37:14,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:14,606 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1693482447, now seen corresponding path program 9 times [2019-11-06 18:37:14,607 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:14,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009210279] [2019-11-06 18:37:14,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:14,738 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009210279] [2019-11-06 18:37:14,738 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691249878] [2019-11-06 18:37:14,738 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 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 18:37:14,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:37:14,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:14,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:14,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:37:14,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:14,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:37:14,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341158485] [2019-11-06 18:37:14,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:37:14,864 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:14,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:37:14,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:37:14,864 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:37:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:15,051 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:37:15,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:37:15,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:37:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:15,053 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:37:15,053 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:37:15,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 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 18:37:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:37:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:37:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:37:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:37:15,060 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:37:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:15,061 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:37:15,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:37:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:37:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:37:15,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:15,062 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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 18:37:15,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:15,266 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:15,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1088178321, now seen corresponding path program 10 times [2019-11-06 18:37:15,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:15,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404107290] [2019-11-06 18:37:15,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:37:15,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404107290] [2019-11-06 18:37:15,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359363734] [2019-11-06 18:37:15,443 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 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 18:37:15,518 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:15,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:15,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:37:15,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:37:15,612 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:15,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:37:15,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176554285] [2019-11-06 18:37:15,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:37:15,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:15,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:37:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:37:15,614 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:37:15,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:15,892 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:37:15,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:37:15,892 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:37:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:15,893 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:37:15,893 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:37:15,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:37:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:37:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:37:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:37:15,904 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:37:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:15,904 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:37:15,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:37:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:37:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:37:15,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:15,905 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 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 18:37:16,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:16,110 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1682227375, now seen corresponding path program 11 times [2019-11-06 18:37:16,111 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:16,111 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374891680] [2019-11-06 18:37:16,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:37:16,281 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374891680] [2019-11-06 18:37:16,282 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172963182] [2019-11-06 18:37:16,282 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 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 18:37:16,641 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:37:16,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:16,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:37:16,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:37:16,733 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:16,733 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:37:16,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276774756] [2019-11-06 18:37:16,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:37:16,734 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:16,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:37:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:37:16,735 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:37:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:17,006 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:37:17,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:37:17,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:37:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:17,007 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:37:17,007 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:37:17,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:37:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:37:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:37:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:37:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:37:17,015 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:37:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:17,015 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:37:17,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:37:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:37:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:37:17,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:17,018 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 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 18:37:17,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:17,229 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash -204807151, now seen corresponding path program 12 times [2019-11-06 18:37:17,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:17,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668632518] [2019-11-06 18:37:17,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:37:17,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668632518] [2019-11-06 18:37:17,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131100296] [2019-11-06 18:37:17,380 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 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 18:37:17,523 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:37:17,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:17,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:37:17,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:37:17,581 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:17,581 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:37:17,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806258516] [2019-11-06 18:37:17,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:37:17,582 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:37:17,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:37:17,582 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:37:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:17,768 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:37:17,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:37:17,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:37:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:17,770 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:37:17,770 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:37:17,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 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 18:37:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:37:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:37:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:37:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:37:17,776 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:37:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:17,777 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:37:17,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:37:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:37:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:37:17,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:17,778 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 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 18:37:17,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:17,986 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1908818575, now seen corresponding path program 13 times [2019-11-06 18:37:17,987 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:17,988 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797342128] [2019-11-06 18:37:17,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:18,167 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797342128] [2019-11-06 18:37:18,168 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904664429] [2019-11-06 18:37:18,168 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 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 18:37:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:37:18,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:18,280 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:18,280 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:37:18,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855815806] [2019-11-06 18:37:18,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:37:18,281 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:37:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:37:18,282 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:37:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:18,383 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:37:18,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:37:18,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:37:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:18,384 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:37:18,384 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:37:18,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 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 18:37:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:37:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:37:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:37:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:37:18,390 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:37:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:18,391 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:37:18,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:37:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:37:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:37:18,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:18,392 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 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 18:37:18,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:18,596 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 682719315, now seen corresponding path program 14 times [2019-11-06 18:37:18,597 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:18,597 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778068868] [2019-11-06 18:37:18,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:18,815 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778068868] [2019-11-06 18:37:18,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669431355] [2019-11-06 18:37:18,816 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 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 18:37:18,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:18,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:18,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:37:18,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:18,912 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:18,912 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:37:18,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017011882] [2019-11-06 18:37:18,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:37:18,913 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:37:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:37:18,914 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:37:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:19,030 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:37:19,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:37:19,031 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:37:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:19,032 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:37:19,032 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:37:19,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 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 18:37:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:37:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:37:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:37:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:37:19,039 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:37:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:19,040 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:37:19,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:37:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:37:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:37:19,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:19,041 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 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 18:37:19,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:19,247 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash 69599925, now seen corresponding path program 15 times [2019-11-06 18:37:19,248 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:19,248 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332282234] [2019-11-06 18:37:19,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:19,461 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332282234] [2019-11-06 18:37:19,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353446172] [2019-11-06 18:37:19,462 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:19,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:37:19,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:19,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:37:19,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:37:19,628 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:19,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:37:19,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787147605] [2019-11-06 18:37:19,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:37:19,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:19,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:37:19,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:19,631 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:37:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:19,835 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:37:19,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:37:19,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:37:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:19,837 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:37:19,837 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:37:19,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:37:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:37:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:37:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:37:19,842 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:37:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:19,843 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:37:19,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:37:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:37:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:37:19,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:19,845 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 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 18:37:20,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:20,048 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:20,049 INFO L82 PathProgramCache]: Analyzing trace with hash -901824235, now seen corresponding path program 16 times [2019-11-06 18:37:20,050 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:20,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956162223] [2019-11-06 18:37:20,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:37:20,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956162223] [2019-11-06 18:37:20,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896857638] [2019-11-06 18:37:20,318 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:20,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:20,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:20,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:37:20,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:37:20,435 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:20,436 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:37:20,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011966780] [2019-11-06 18:37:20,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:37:20,436 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:20,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:37:20,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:37:20,437 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:37:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:20,626 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:37:20,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:37:20,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:37:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:20,627 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:37:20,627 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:37:20,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 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 18:37:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:37:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:37:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:37:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:37:20,632 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:37:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:20,633 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:37:20,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:37:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:37:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:37:20,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:20,634 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 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 18:37:20,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:20,838 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:20,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:20,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1698235913, now seen corresponding path program 17 times [2019-11-06 18:37:20,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:20,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537756239] [2019-11-06 18:37:20,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:37:21,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537756239] [2019-11-06 18:37:21,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175865233] [2019-11-06 18:37:21,146 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 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 18:37:21,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:37:21,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:21,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:37:21,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:37:22,093 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:22,093 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:37:22,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900904311] [2019-11-06 18:37:22,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:37:22,094 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:22,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:37:22,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:37:22,095 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:37:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:22,461 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:37:22,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:37:22,461 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:37:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:22,462 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:37:22,462 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:37:22,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:37:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:37:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:37:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:37:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:37:22,470 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:37:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:22,470 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:37:22,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:37:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:37:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:37:22,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:22,471 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 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 18:37:22,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:22,676 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash 112259767, now seen corresponding path program 18 times [2019-11-06 18:37:22,677 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:22,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726608066] [2019-11-06 18:37:22,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:37:22,943 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726608066] [2019-11-06 18:37:22,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452353477] [2019-11-06 18:37:22,944 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 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 18:37:23,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:37:23,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:23,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:37:23,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 269 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-06 18:37:23,757 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:23,757 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-11-06 18:37:23,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800204920] [2019-11-06 18:37:23,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:37:23,758 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:37:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:37:23,759 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 30 states. [2019-11-06 18:37:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:24,142 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2019-11-06 18:37:24,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:37:24,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2019-11-06 18:37:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:24,146 INFO L225 Difference]: With dead ends: 130 [2019-11-06 18:37:24,146 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:37:24,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:37:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:37:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:37:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:37:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:37:24,159 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 120 [2019-11-06 18:37:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:24,159 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:37:24,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:37:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:37:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:37:24,163 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:24,163 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 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 18:37:24,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:24,368 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash 514208377, now seen corresponding path program 19 times [2019-11-06 18:37:24,369 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:24,370 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120219181] [2019-11-06 18:37:24,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:24,661 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120219181] [2019-11-06 18:37:24,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523579105] [2019-11-06 18:37:24,662 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 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 18:37:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:37:24,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:24,774 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:24,775 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:37:24,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704891356] [2019-11-06 18:37:24,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:37:24,776 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:24,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:37:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:37:24,776 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:37:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:24,917 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:37:24,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:37:24,917 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:37:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:24,918 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:37:24,918 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:37:24,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:37:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:37:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:37:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:37:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:37:24,925 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:37:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:24,925 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:37:24,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:37:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:37:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:37:24,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:24,927 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 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 18:37:25,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:25,130 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1320413019, now seen corresponding path program 20 times [2019-11-06 18:37:25,131 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:25,131 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117720227] [2019-11-06 18:37:25,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:25,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117720227] [2019-11-06 18:37:25,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847577499] [2019-11-06 18:37:25,506 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 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 18:37:25,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:25,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:25,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:37:25,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:25,692 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:25,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-11-06 18:37:25,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77843051] [2019-11-06 18:37:25,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:37:25,694 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:25,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:37:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:37:25,695 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2019-11-06 18:37:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:25,871 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2019-11-06 18:37:25,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:37:25,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-11-06 18:37:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:25,872 INFO L225 Difference]: With dead ends: 136 [2019-11-06 18:37:25,872 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:37:25,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:37:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:37:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-11-06 18:37:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-06 18:37:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-11-06 18:37:25,878 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 128 [2019-11-06 18:37:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:25,878 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-11-06 18:37:25,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:37:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-11-06 18:37:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 18:37:25,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:25,879 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 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 18:37:26,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:26,084 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1306006595, now seen corresponding path program 21 times [2019-11-06 18:37:26,085 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:26,085 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955626578] [2019-11-06 18:37:26,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:26,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955626578] [2019-11-06 18:37:26,428 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664077809] [2019-11-06 18:37:26,428 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 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 18:37:26,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:37:26,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:26,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:37:26,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2019-11-06 18:37:26,656 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:26,656 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2019-11-06 18:37:26,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909615130] [2019-11-06 18:37:26,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 18:37:26,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 18:37:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:37:26,658 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 33 states. [2019-11-06 18:37:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:26,979 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-11-06 18:37:26,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 18:37:26,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-11-06 18:37:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:26,981 INFO L225 Difference]: With dead ends: 141 [2019-11-06 18:37:26,981 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:37:26,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:37:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:37:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-11-06 18:37:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:37:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:37:26,986 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 130 [2019-11-06 18:37:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:26,987 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:37:26,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 18:37:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:37:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:37:26,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:26,989 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 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 18:37:27,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:27,193 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1262417379, now seen corresponding path program 22 times [2019-11-06 18:37:27,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:27,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789783693] [2019-11-06 18:37:27,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:37:27,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789783693] [2019-11-06 18:37:27,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025062078] [2019-11-06 18:37:27,579 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 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 18:37:27,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:27,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:27,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:37:27,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:37:27,784 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:27,785 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-06 18:37:27,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904702751] [2019-11-06 18:37:27,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:37:27,786 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:37:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:37:27,787 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 28 states. [2019-11-06 18:37:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:28,084 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-06 18:37:28,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:37:28,084 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2019-11-06 18:37:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:28,085 INFO L225 Difference]: With dead ends: 144 [2019-11-06 18:37:28,086 INFO L226 Difference]: Without dead ends: 100 [2019-11-06 18:37:28,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:37:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-06 18:37:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-06 18:37:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-06 18:37:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-11-06 18:37:28,096 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 134 [2019-11-06 18:37:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:28,097 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-11-06 18:37:28,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:37:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-11-06 18:37:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 18:37:28,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:28,099 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 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 18:37:28,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:28,304 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1975206657, now seen corresponding path program 23 times [2019-11-06 18:37:28,305 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:28,305 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365307850] [2019-11-06 18:37:28,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:37:28,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365307850] [2019-11-06 18:37:28,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896630283] [2019-11-06 18:37:28,939 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 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 18:37:32,016 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-06 18:37:32,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:32,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:37:32,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-11-06 18:37:32,192 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:32,193 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:37:32,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060484119] [2019-11-06 18:37:32,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:37:32,194 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:37:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:37:32,195 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 36 states. [2019-11-06 18:37:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:32,686 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-11-06 18:37:32,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:37:32,687 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2019-11-06 18:37:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:32,688 INFO L225 Difference]: With dead ends: 149 [2019-11-06 18:37:32,688 INFO L226 Difference]: Without dead ends: 105 [2019-11-06 18:37:32,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 18:37:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-06 18:37:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-06 18:37:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-06 18:37:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-11-06 18:37:32,694 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 136 [2019-11-06 18:37:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:32,694 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-11-06 18:37:32,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:37:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-11-06 18:37:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 18:37:32,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:32,699 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 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 18:37:32,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:32,905 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash -702773313, now seen corresponding path program 24 times [2019-11-06 18:37:32,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:32,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924532047] [2019-11-06 18:37:32,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:37:33,390 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924532047] [2019-11-06 18:37:33,390 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509183053] [2019-11-06 18:37:33,390 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 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 18:37:35,395 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:37:35,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:35,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:37:35,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2019-11-06 18:37:35,560 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:35,560 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2019-11-06 18:37:35,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922167483] [2019-11-06 18:37:35,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 18:37:35,560 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 18:37:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:37:35,561 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 38 states. [2019-11-06 18:37:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:36,125 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2019-11-06 18:37:36,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-06 18:37:36,125 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2019-11-06 18:37:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:36,126 INFO L225 Difference]: With dead ends: 155 [2019-11-06 18:37:36,126 INFO L226 Difference]: Without dead ends: 109 [2019-11-06 18:37:36,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2019-11-06 18:37:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-06 18:37:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-11-06 18:37:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:37:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:37:36,133 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 144 [2019-11-06 18:37:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:36,133 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:37:36,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 18:37:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:37:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 18:37:36,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:36,136 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 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 18:37:36,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:36,341 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:36,342 INFO L82 PathProgramCache]: Analyzing trace with hash 859439231, now seen corresponding path program 25 times [2019-11-06 18:37:36,343 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:36,343 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114785118] [2019-11-06 18:37:36,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:37:36,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114785118] [2019-11-06 18:37:36,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812641886] [2019-11-06 18:37:36,734 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 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 18:37:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:36,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:37:36,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:37:36,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:36,903 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:37:36,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826230420] [2019-11-06 18:37:36,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:37:36,903 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:37:36,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:37:36,904 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:37:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:37,185 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:37:37,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:37:37,185 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2019-11-06 18:37:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:37,186 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:37:37,186 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:37:37,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:37:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:37:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:37:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:37:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:37:37,191 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 152 [2019-11-06 18:37:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:37,191 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:37:37,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:37:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:37:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 18:37:37,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:37,192 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 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 18:37:37,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:37,395 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash -698384671, now seen corresponding path program 26 times [2019-11-06 18:37:37,396 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:37,396 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826640553] [2019-11-06 18:37:37,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:37:37,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826640553] [2019-11-06 18:37:37,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689597665] [2019-11-06 18:37:37,949 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 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 18:37:38,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:38,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:38,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:37:38,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:37:38,190 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:38,190 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-11-06 18:37:38,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400268900] [2019-11-06 18:37:38,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:37:38,192 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:37:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:37:38,194 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 32 states. [2019-11-06 18:37:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:38,523 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2019-11-06 18:37:38,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:37:38,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 154 [2019-11-06 18:37:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:38,525 INFO L225 Difference]: With dead ends: 160 [2019-11-06 18:37:38,525 INFO L226 Difference]: Without dead ends: 112 [2019-11-06 18:37:38,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:37:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-06 18:37:38,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-11-06 18:37:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-06 18:37:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-11-06 18:37:38,537 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 154 [2019-11-06 18:37:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:38,538 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-11-06 18:37:38,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:37:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-11-06 18:37:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 18:37:38,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:38,540 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 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 18:37:38,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:38,746 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1176431811, now seen corresponding path program 27 times [2019-11-06 18:37:38,747 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:38,747 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356733305] [2019-11-06 18:37:38,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-11-06 18:37:39,415 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356733305] [2019-11-06 18:37:39,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946362462] [2019-11-06 18:37:39,416 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:39,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:37:39,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:39,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:37:39,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 370 proven. 49 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2019-11-06 18:37:39,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:39,821 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2019-11-06 18:37:39,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704247040] [2019-11-06 18:37:39,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:37:39,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:39,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:37:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:37:39,823 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 40 states. [2019-11-06 18:37:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:40,173 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-11-06 18:37:40,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:37:40,173 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2019-11-06 18:37:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:40,174 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:37:40,174 INFO L226 Difference]: Without dead ends: 117 [2019-11-06 18:37:40,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:37:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-06 18:37:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-11-06 18:37:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-06 18:37:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-11-06 18:37:40,179 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 156 [2019-11-06 18:37:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:40,179 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-11-06 18:37:40,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:37:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-11-06 18:37:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 18:37:40,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:40,180 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 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 18:37:40,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:40,386 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash 402103075, now seen corresponding path program 28 times [2019-11-06 18:37:40,388 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:40,388 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305069787] [2019-11-06 18:37:40,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:37:41,166 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305069787] [2019-11-06 18:37:41,167 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942862768] [2019-11-06 18:37:41,167 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:41,338 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:41,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:41,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:37:41,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-11-06 18:37:41,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:41,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-06 18:37:41,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503758702] [2019-11-06 18:37:41,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-06 18:37:41,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:41,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-06 18:37:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1243, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:37:41,734 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 43 states. [2019-11-06 18:37:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:42,414 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2019-11-06 18:37:42,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-06 18:37:42,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 160 [2019-11-06 18:37:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:42,415 INFO L225 Difference]: With dead ends: 171 [2019-11-06 18:37:42,415 INFO L226 Difference]: Without dead ends: 121 [2019-11-06 18:37:42,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2019-11-06 18:37:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-06 18:37:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-11-06 18:37:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-06 18:37:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-11-06 18:37:42,429 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 160 [2019-11-06 18:37:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:42,432 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-11-06 18:37:42,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-06 18:37:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-11-06 18:37:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 18:37:42,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:42,434 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 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 18:37:42,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:42,638 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:42,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:42,638 INFO L82 PathProgramCache]: Analyzing trace with hash -595520541, now seen corresponding path program 29 times [2019-11-06 18:37:42,639 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:42,639 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108469104] [2019-11-06 18:37:42,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:37:43,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108469104] [2019-11-06 18:37:43,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002949161] [2019-11-06 18:37:43,372 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true