/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:27:37,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:27:37,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:27:37,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:27:37,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:27:37,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:27:37,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:27:37,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:27:37,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:27:37,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:27:37,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:27:37,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:27:37,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:27:37,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:27:37,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:27:37,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:27:37,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:27:37,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:27:37,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:27:37,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:27:37,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:27:37,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:27:37,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:27:37,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:27:37,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:27:37,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:27:37,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:27:37,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:27:37,681 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 [2019-11-23 20:27:37,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:27:37,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:27:37,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:27:37,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:27:37,704 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:27:37,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:27:37,705 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:27:37,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:27:37,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:27:37,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:27:37,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:27:37,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:27:37,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:27:37,707 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:27:37,707 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:27:37,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:27:37,707 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:27:37,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:27:37,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:27:37,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:27:37,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:27:37,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:27:37,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:27:37,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:27:37,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:27:37,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:27:37,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:27:37,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:27:37,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:27:37,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:27:37,986 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:27:37,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:27:38,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:27:38,004 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:27:38,004 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:27:38,005 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-11-23 20:27:38,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65e48ce04/55b852b99e7542d9bde9ee23381f8517/FLAGd4c6901d5 [2019-11-23 20:27:38,535 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:27:38,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-11-23 20:27:38,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65e48ce04/55b852b99e7542d9bde9ee23381f8517/FLAGd4c6901d5 [2019-11-23 20:27:38,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65e48ce04/55b852b99e7542d9bde9ee23381f8517 [2019-11-23 20:27:38,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:27:38,954 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:27:38,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:38,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:27:38,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:27:38,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:38" (1/1) ... [2019-11-23 20:27:38,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190dac61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:38, skipping insertion in model container [2019-11-23 20:27:38,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:38" (1/1) ... [2019-11-23 20:27:38,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:27:38,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:27:39,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:39,206 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:27:39,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:39,256 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:27:39,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39 WrapperNode [2019-11-23 20:27:39,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:39,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:39,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:27:39,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:27:39,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:39,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:27:39,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:27:39,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:27:39,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (1/1) ... [2019-11-23 20:27:39,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:27:39,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:27:39,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:27:39,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:27:39,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (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 [2019-11-23 20:27:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:27:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:27:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:27:39,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:27:39,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:27:39,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:27:39,752 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:27:39,752 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:27:39,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:39 BoogieIcfgContainer [2019-11-23 20:27:39,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:27:39,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:27:39,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:27:39,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:27:39,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:27:38" (1/3) ... [2019-11-23 20:27:39,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7f8d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:39, skipping insertion in model container [2019-11-23 20:27:39,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:39" (2/3) ... [2019-11-23 20:27:39,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7f8d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:39, skipping insertion in model container [2019-11-23 20:27:39,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:39" (3/3) ... [2019-11-23 20:27:39,762 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2019-11-23 20:27:39,774 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:27:39,796 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:27:39,825 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:27:39,886 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:27:39,887 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:27:39,887 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:27:39,887 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:27:39,887 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:27:39,891 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:27:39,891 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:27:39,891 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:27:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-23 20:27:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 20:27:39,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:39,949 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:39,949 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2019-11-23 20:27:39,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:39,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725842781] [2019-11-23 20:27:39,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:40,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725842781] [2019-11-23 20:27:40,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:27:40,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:27:40,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752416781] [2019-11-23 20:27:40,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:27:40,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:40,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:27:40,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:40,155 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-11-23 20:27:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:40,184 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2019-11-23 20:27:40,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:27:40,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 20:27:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:40,196 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:27:40,197 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 20:27:40,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 20:27:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 20:27:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 20:27:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-23 20:27:40,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2019-11-23 20:27:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:40,233 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-23 20:27:40,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:27:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-23 20:27:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:27:40,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:40,235 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:40,235 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2019-11-23 20:27:40,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:40,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754665920] [2019-11-23 20:27:40,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:40,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754665920] [2019-11-23 20:27:40,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579171383] [2019-11-23 20:27:40,294 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 [2019-11-23 20:27:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:40,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:27:40,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:40,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:40,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:27:40,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636326060] [2019-11-23 20:27:40,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:27:40,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:40,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:27:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:40,394 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2019-11-23 20:27:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:40,421 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-11-23 20:27:40,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:27:40,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-23 20:27:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:40,423 INFO L225 Difference]: With dead ends: 19 [2019-11-23 20:27:40,423 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:27:40,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:27:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:27:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:27:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 20:27:40,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 20:27:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:40,428 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 20:27:40,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:27:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 20:27:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:27:40,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:40,429 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:40,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:40,635 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash 490447920, now seen corresponding path program 2 times [2019-11-23 20:27:40,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:40,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465402115] [2019-11-23 20:27:40,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:40,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465402115] [2019-11-23 20:27:40,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426771476] [2019-11-23 20:27:40,717 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 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 [2019-11-23 20:27:40,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:40,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:40,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:27:40,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:40,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:40,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:27:40,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817652454] [2019-11-23 20:27:40,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:27:40,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:27:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:40,776 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2019-11-23 20:27:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:40,797 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-23 20:27:40,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:27:40,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-23 20:27:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:40,799 INFO L225 Difference]: With dead ends: 20 [2019-11-23 20:27:40,799 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 20:27:40,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 20:27:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 20:27:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:27:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-23 20:27:40,804 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-23 20:27:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:40,804 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-23 20:27:40,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:27:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-23 20:27:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:27:40,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:40,805 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:41,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,016 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1924507733, now seen corresponding path program 3 times [2019-11-23 20:27:41,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:41,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998263682] [2019-11-23 20:27:41,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:41,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998263682] [2019-11-23 20:27:41,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247956769] [2019-11-23 20:27:41,092 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 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 [2019-11-23 20:27:41,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:27:41,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:41,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:27:41,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:41,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:41,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:27:41,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567136830] [2019-11-23 20:27:41,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:27:41,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:27:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:41,161 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2019-11-23 20:27:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:41,188 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-23 20:27:41,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:27:41,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 20:27:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:41,190 INFO L225 Difference]: With dead ends: 21 [2019-11-23 20:27:41,190 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:27:41,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:27:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 20:27:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:27:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-23 20:27:41,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-11-23 20:27:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:41,200 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-23 20:27:41,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:27:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-23 20:27:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:27:41,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:41,203 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:41,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,417 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 4 times [2019-11-23 20:27:41,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:41,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85049070] [2019-11-23 20:27:41,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:41,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85049070] [2019-11-23 20:27:41,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099304] [2019-11-23 20:27:41,524 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 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 [2019-11-23 20:27:41,562 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:41,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:41,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:27:41,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:41,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:41,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:27:41,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333282125] [2019-11-23 20:27:41,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:27:41,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:41,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:27:41,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:41,586 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-23 20:27:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:41,610 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2019-11-23 20:27:41,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:27:41,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-23 20:27:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:41,612 INFO L225 Difference]: With dead ends: 22 [2019-11-23 20:27:41,612 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:27:41,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:27:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:27:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:27:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 20:27:41,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-11-23 20:27:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:41,617 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 20:27:41,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:27:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 20:27:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:27:41,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:41,630 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:41,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:41,831 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -968764341, now seen corresponding path program 5 times [2019-11-23 20:27:41,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:41,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76044220] [2019-11-23 20:27:41,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:41,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76044220] [2019-11-23 20:27:41,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739990878] [2019-11-23 20:27:41,945 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 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 [2019-11-23 20:27:41,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:27:41,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:41,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:27:41,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:42,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:42,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:27:42,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360451437] [2019-11-23 20:27:42,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:27:42,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:42,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:27:42,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:42,020 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2019-11-23 20:27:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:42,041 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-23 20:27:42,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:27:42,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-11-23 20:27:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:42,043 INFO L225 Difference]: With dead ends: 23 [2019-11-23 20:27:42,043 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:27:42,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:27:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:27:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:27:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-23 20:27:42,048 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-11-23 20:27:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:42,048 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-23 20:27:42,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:27:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-23 20:27:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:27:42,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:42,049 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:42,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:42,254 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash 84552432, now seen corresponding path program 6 times [2019-11-23 20:27:42,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:42,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541747451] [2019-11-23 20:27:42,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:42,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541747451] [2019-11-23 20:27:42,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764913566] [2019-11-23 20:27:42,351 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 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 [2019-11-23 20:27:42,383 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:27:42,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:42,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:27:42,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:42,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:42,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:27:42,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229871649] [2019-11-23 20:27:42,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:27:42,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:42,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:27:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:42,403 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2019-11-23 20:27:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:42,424 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-23 20:27:42,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:27:42,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-23 20:27:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:42,425 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:27:42,425 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:27:42,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:27:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:27:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:27:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-23 20:27:42,429 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2019-11-23 20:27:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:42,430 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-23 20:27:42,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:27:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-23 20:27:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:27:42,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:42,431 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:42,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:42,634 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1622365973, now seen corresponding path program 7 times [2019-11-23 20:27:42,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:42,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331753195] [2019-11-23 20:27:42,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:42,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331753195] [2019-11-23 20:27:42,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910005941] [2019-11-23 20:27:42,778 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 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 [2019-11-23 20:27:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:42,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:27:42,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:42,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:42,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:27:42,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122201808] [2019-11-23 20:27:42,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:27:42,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:42,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:27:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:42,851 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-23 20:27:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:42,892 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-11-23 20:27:42,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:27:42,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-11-23 20:27:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:42,893 INFO L225 Difference]: With dead ends: 25 [2019-11-23 20:27:42,893 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:27:42,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:27:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:27:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:27:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-23 20:27:42,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-11-23 20:27:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:42,903 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-23 20:27:42,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:27:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-23 20:27:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:27:42,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:42,904 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:43,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:43,109 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1297738320, now seen corresponding path program 8 times [2019-11-23 20:27:43,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:43,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625427368] [2019-11-23 20:27:43,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:43,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625427368] [2019-11-23 20:27:43,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882719716] [2019-11-23 20:27:43,226 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 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 [2019-11-23 20:27:43,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:43,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:43,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:27:43,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:43,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:43,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:27:43,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939051628] [2019-11-23 20:27:43,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:27:43,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:43,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:27:43,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:43,287 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2019-11-23 20:27:43,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:43,309 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-23 20:27:43,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:27:43,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-11-23 20:27:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:43,311 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:27:43,311 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:27:43,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:27:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 20:27:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:27:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-23 20:27:43,317 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2019-11-23 20:27:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:43,317 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-23 20:27:43,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:27:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-23 20:27:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:27:43,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:43,318 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:43,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:43,519 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1626658187, now seen corresponding path program 9 times [2019-11-23 20:27:43,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:43,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95962076] [2019-11-23 20:27:43,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:43,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95962076] [2019-11-23 20:27:43,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096121100] [2019-11-23 20:27:43,655 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 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 [2019-11-23 20:27:43,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:27:43,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:43,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:27:43,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:43,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:43,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:27:43,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656204929] [2019-11-23 20:27:43,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:27:43,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:27:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:27:43,730 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2019-11-23 20:27:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:43,756 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-23 20:27:43,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:27:43,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-23 20:27:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:43,760 INFO L225 Difference]: With dead ends: 27 [2019-11-23 20:27:43,760 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:27:43,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:27:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:27:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:27:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:27:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-23 20:27:43,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-11-23 20:27:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:43,765 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-23 20:27:43,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:27:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-23 20:27:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:27:43,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:43,766 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:43,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:43,970 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 10 times [2019-11-23 20:27:43,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:43,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635433430] [2019-11-23 20:27:43,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:44,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635433430] [2019-11-23 20:27:44,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272214339] [2019-11-23 20:27:44,110 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 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 [2019-11-23 20:27:44,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:44,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:44,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:27:44,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:44,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:44,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:27:44,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579920007] [2019-11-23 20:27:44,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:27:44,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:44,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:27:44,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:44,170 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2019-11-23 20:27:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:44,203 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-23 20:27:44,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:27:44,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-23 20:27:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:44,204 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:27:44,204 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:27:44,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:27:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:27:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:27:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-23 20:27:44,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2019-11-23 20:27:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:44,208 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-23 20:27:44,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:27:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-23 20:27:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:27:44,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:44,209 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:44,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:44,412 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1497651755, now seen corresponding path program 11 times [2019-11-23 20:27:44,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:44,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085039027] [2019-11-23 20:27:44,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:44,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085039027] [2019-11-23 20:27:44,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392176457] [2019-11-23 20:27:44,560 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 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 [2019-11-23 20:27:44,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:27:44,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:44,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:27:44,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:44,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:44,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:27:44,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128395456] [2019-11-23 20:27:44,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:27:44,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:27:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:27:44,649 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2019-11-23 20:27:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:44,684 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-23 20:27:44,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:27:44,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-23 20:27:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:44,686 INFO L225 Difference]: With dead ends: 29 [2019-11-23 20:27:44,686 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:27:44,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:27:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:27:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 20:27:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:27:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-23 20:27:44,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2019-11-23 20:27:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:44,690 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-23 20:27:44,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:27:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-23 20:27:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:27:44,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:44,691 INFO L410 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:44,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:44,896 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash -765959920, now seen corresponding path program 12 times [2019-11-23 20:27:44,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:44,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683652785] [2019-11-23 20:27:44,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:45,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683652785] [2019-11-23 20:27:45,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320463755] [2019-11-23 20:27:45,084 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:45,158 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:27:45,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:45,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:27:45,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:45,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:45,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:27:45,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201321301] [2019-11-23 20:27:45,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:27:45,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:45,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:27:45,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:27:45,198 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2019-11-23 20:27:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:45,239 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-23 20:27:45,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:27:45,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-11-23 20:27:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:45,241 INFO L225 Difference]: With dead ends: 30 [2019-11-23 20:27:45,241 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:27:45,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:27:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:27:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:27:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:27:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-23 20:27:45,251 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2019-11-23 20:27:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:45,251 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-23 20:27:45,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:27:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-23 20:27:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:27:45,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:45,253 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:45,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:45,464 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:45,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2076522187, now seen corresponding path program 13 times [2019-11-23 20:27:45,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:45,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219958116] [2019-11-23 20:27:45,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:45,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219958116] [2019-11-23 20:27:45,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004094372] [2019-11-23 20:27:45,615 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:45,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:27:45,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:45,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:45,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:27:45,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133364343] [2019-11-23 20:27:45,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:27:45,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:45,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:27:45,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:45,685 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2019-11-23 20:27:45,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:45,719 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-23 20:27:45,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:27:45,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-23 20:27:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:45,722 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:27:45,723 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:27:45,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:27:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 20:27:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:27:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-23 20:27:45,729 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2019-11-23 20:27:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:45,729 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-23 20:27:45,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:27:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-23 20:27:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:27:45,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:45,730 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:45,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:45,931 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash -845712, now seen corresponding path program 14 times [2019-11-23 20:27:45,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:45,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487886826] [2019-11-23 20:27:45,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:46,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487886826] [2019-11-23 20:27:46,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502945091] [2019-11-23 20:27:46,070 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 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 [2019-11-23 20:27:46,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:46,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:46,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:27:46,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:46,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:46,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:27:46,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927737918] [2019-11-23 20:27:46,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:27:46,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:27:46,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:46,147 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2019-11-23 20:27:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:46,182 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-23 20:27:46,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:27:46,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-11-23 20:27:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:46,188 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:27:46,188 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:27:46,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:27:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 20:27:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:27:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-23 20:27:46,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2019-11-23 20:27:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:46,195 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-23 20:27:46,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:27:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-23 20:27:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:27:46,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:46,196 INFO L410 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:46,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:46,399 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 25258859, now seen corresponding path program 15 times [2019-11-23 20:27:46,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:46,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049465673] [2019-11-23 20:27:46,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:46,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049465673] [2019-11-23 20:27:46,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647384200] [2019-11-23 20:27:46,579 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 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 [2019-11-23 20:27:46,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:27:46,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:46,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:27:46,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:46,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:46,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:27:46,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430275658] [2019-11-23 20:27:46,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:27:46,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:27:46,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:46,676 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 19 states. [2019-11-23 20:27:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:46,713 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-23 20:27:46,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:27:46,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-23 20:27:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:46,715 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:27:46,715 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:27:46,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:27:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:27:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:27:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-23 20:27:46,721 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2019-11-23 20:27:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:46,721 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-23 20:27:46,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:27:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-23 20:27:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:27:46,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:46,722 INFO L410 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:46,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:46,926 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:46,926 INFO L82 PathProgramCache]: Analyzing trace with hash 834500560, now seen corresponding path program 16 times [2019-11-23 20:27:46,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:46,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711630247] [2019-11-23 20:27:46,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:47,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711630247] [2019-11-23 20:27:47,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454760734] [2019-11-23 20:27:47,113 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 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 [2019-11-23 20:27:47,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:47,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:47,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:27:47,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:47,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:47,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:27:47,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512999372] [2019-11-23 20:27:47,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:27:47,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:47,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:27:47,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:47,172 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2019-11-23 20:27:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:47,202 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-23 20:27:47,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:27:47,202 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-11-23 20:27:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:47,203 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:27:47,203 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:27:47,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:27:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 20:27:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:27:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-23 20:27:47,207 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2019-11-23 20:27:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:47,207 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-23 20:27:47,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:27:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-23 20:27:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:27:47,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:47,209 INFO L410 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:47,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,412 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:47,412 INFO L82 PathProgramCache]: Analyzing trace with hash 151189515, now seen corresponding path program 17 times [2019-11-23 20:27:47,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:47,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679548434] [2019-11-23 20:27:47,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:47,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679548434] [2019-11-23 20:27:47,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742721740] [2019-11-23 20:27:47,613 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 20:27:47,766 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:27:47,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:47,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:27:47,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:47,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:47,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:27:47,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004457268] [2019-11-23 20:27:47,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:27:47,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:27:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:27:47,791 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2019-11-23 20:27:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:47,833 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-23 20:27:47,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:27:47,833 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-11-23 20:27:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:47,834 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:27:47,834 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:27:47,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:27:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:27:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:27:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:27:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-23 20:27:47,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2019-11-23 20:27:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:47,841 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-23 20:27:47,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:27:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-23 20:27:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:27:47,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:47,842 INFO L410 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:48,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:48,046 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:48,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:48,047 INFO L82 PathProgramCache]: Analyzing trace with hash 443383600, now seen corresponding path program 18 times [2019-11-23 20:27:48,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:48,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652028775] [2019-11-23 20:27:48,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:48,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652028775] [2019-11-23 20:27:48,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661206921] [2019-11-23 20:27:48,248 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 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 [2019-11-23 20:27:48,423 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:27:48,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:48,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:27:48,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:48,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:48,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:27:48,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653800872] [2019-11-23 20:27:48,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:27:48,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:27:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:27:48,463 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2019-11-23 20:27:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:48,501 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-23 20:27:48,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:27:48,502 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-11-23 20:27:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:48,502 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:27:48,502 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:27:48,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:27:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:27:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:27:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:27:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-23 20:27:48,507 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2019-11-23 20:27:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:48,507 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-23 20:27:48,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:27:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-23 20:27:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:27:48,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:48,508 INFO L410 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:48,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:48,709 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:48,710 INFO L82 PathProgramCache]: Analyzing trace with hash 911465643, now seen corresponding path program 19 times [2019-11-23 20:27:48,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:48,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596469371] [2019-11-23 20:27:48,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:49,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596469371] [2019-11-23 20:27:49,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806490234] [2019-11-23 20:27:49,011 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 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 [2019-11-23 20:27:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:49,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:27:49,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730786804] [2019-11-23 20:27:49,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:27:49,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:27:49,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:27:49,082 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2019-11-23 20:27:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,115 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-11-23 20:27:49,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:27:49,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-11-23 20:27:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,116 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:27:49,116 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:27:49,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:27:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:27:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 20:27:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:27:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-23 20:27:49,120 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2019-11-23 20:27:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,121 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-23 20:27:49,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:27:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-23 20:27:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:27:49,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,122 INFO L410 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,325 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1757860208, now seen corresponding path program 20 times [2019-11-23 20:27:49,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061764440] [2019-11-23 20:27:49,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:49,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061764440] [2019-11-23 20:27:49,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042869285] [2019-11-23 20:27:49,598 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 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 [2019-11-23 20:27:49,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:49,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:49,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:49,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:27:49,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536164601] [2019-11-23 20:27:49,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:27:49,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:27:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:27:49,659 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2019-11-23 20:27:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,699 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-23 20:27:49,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:27:49,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-11-23 20:27:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,704 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:27:49,704 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:27:49,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:27:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:27:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 20:27:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:27:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-11-23 20:27:49,708 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2019-11-23 20:27:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,708 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-11-23 20:27:49,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:27:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-11-23 20:27:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:27:49,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,709 INFO L410 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,913 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1392384331, now seen corresponding path program 21 times [2019-11-23 20:27:49,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031014113] [2019-11-23 20:27:49,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:50,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031014113] [2019-11-23 20:27:50,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427301600] [2019-11-23 20:27:50,171 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 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 [2019-11-23 20:27:50,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:27:50,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:50,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:27:50,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132244740] [2019-11-23 20:27:50,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:27:50,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:27:50,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:27:50,330 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 25 states. [2019-11-23 20:27:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:50,369 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-23 20:27:50,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:27:50,370 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-11-23 20:27:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:50,370 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:27:50,370 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:27:50,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:27:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:27:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:27:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:27:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-23 20:27:50,373 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2019-11-23 20:27:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:50,375 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-23 20:27:50,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:27:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-23 20:27:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:27:50,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:50,378 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,579 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 22 times [2019-11-23 20:27:50,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218703512] [2019-11-23 20:27:50,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:50,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218703512] [2019-11-23 20:27:50,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035446513] [2019-11-23 20:27:50,849 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 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 [2019-11-23 20:27:50,883 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:50,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:50,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:27:50,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053112028] [2019-11-23 20:27:50,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:27:50,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:27:50,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:27:50,910 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2019-11-23 20:27:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:50,948 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-23 20:27:50,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:27:50,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-11-23 20:27:50,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:50,950 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:27:50,950 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:27:50,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:27:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:27:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:27:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:27:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-23 20:27:50,954 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2019-11-23 20:27:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:50,954 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-23 20:27:50,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:27:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-23 20:27:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:27:50,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:50,955 INFO L410 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:51,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,158 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash -301224469, now seen corresponding path program 23 times [2019-11-23 20:27:51,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:51,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763565452] [2019-11-23 20:27:51,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:51,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763565452] [2019-11-23 20:27:51,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027239805] [2019-11-23 20:27:51,502 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 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 [2019-11-23 20:27:51,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 20:27:51,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:51,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:27:51,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:51,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:51,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:27:51,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614226931] [2019-11-23 20:27:51,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:27:51,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:27:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:27:51,817 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 27 states. [2019-11-23 20:27:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:51,882 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-23 20:27:51,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:27:51,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-11-23 20:27:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:51,883 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:27:51,883 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:27:51,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:27:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:27:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 20:27:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:27:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-23 20:27:51,894 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2019-11-23 20:27:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:51,894 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-23 20:27:51,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:27:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-23 20:27:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:27:51,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:51,895 INFO L410 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:52,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,100 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:52,101 INFO L82 PathProgramCache]: Analyzing trace with hash -696548016, now seen corresponding path program 24 times [2019-11-23 20:27:52,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:52,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903815441] [2019-11-23 20:27:52,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:52,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903815441] [2019-11-23 20:27:52,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029024684] [2019-11-23 20:27:52,440 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,544 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:27:53,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:53,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:27:53,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:53,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:53,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:27:53,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472628619] [2019-11-23 20:27:53,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:27:53,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:27:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:27:53,563 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2019-11-23 20:27:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:53,623 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-23 20:27:53,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:27:53,624 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-11-23 20:27:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:53,624 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:27:53,624 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:27:53,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:27:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:27:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 20:27:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:27:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-23 20:27:53,628 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2019-11-23 20:27:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:53,629 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-23 20:27:53,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:27:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-23 20:27:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:27:53,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:53,629 INFO L410 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:53,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,830 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash -66676085, now seen corresponding path program 25 times [2019-11-23 20:27:53,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:53,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118789604] [2019-11-23 20:27:53,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:54,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118789604] [2019-11-23 20:27:54,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664015533] [2019-11-23 20:27:54,209 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:54,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:27:54,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:54,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:54,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:27:54,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323468425] [2019-11-23 20:27:54,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:27:54,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:54,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:27:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:27:54,274 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2019-11-23 20:27:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:54,323 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-11-23 20:27:54,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:27:54,323 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-11-23 20:27:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:54,324 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:27:54,324 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:27:54,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:27:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:27:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:27:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:27:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-23 20:27:54,330 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2019-11-23 20:27:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:54,330 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-23 20:27:54,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:27:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-23 20:27:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:27:54,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:54,331 INFO L410 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:54,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,535 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2015482704, now seen corresponding path program 26 times [2019-11-23 20:27:54,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:54,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393190803] [2019-11-23 20:27:54,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:54,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393190803] [2019-11-23 20:27:54,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724713826] [2019-11-23 20:27:54,952 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 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 [2019-11-23 20:27:55,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:55,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:55,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:27:55,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:55,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:55,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:27:55,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771017922] [2019-11-23 20:27:55,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:27:55,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:55,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:27:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:27:55,037 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2019-11-23 20:27:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:55,100 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-23 20:27:55,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:27:55,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-11-23 20:27:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:55,101 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:27:55,101 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:27:55,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:27:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:27:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 20:27:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:27:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-23 20:27:55,112 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2019-11-23 20:27:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:55,112 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-23 20:27:55,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:27:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-23 20:27:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:27:55,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:55,118 INFO L410 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:55,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:55,322 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:55,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1996021547, now seen corresponding path program 27 times [2019-11-23 20:27:55,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:55,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145268359] [2019-11-23 20:27:55,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:55,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145268359] [2019-11-23 20:27:55,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62029866] [2019-11-23 20:27:55,716 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 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 [2019-11-23 20:27:57,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:27:57,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:57,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:27:57,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:57,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:57,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:27:57,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139159865] [2019-11-23 20:27:57,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:27:57,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:27:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:27:57,040 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 31 states. [2019-11-23 20:27:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:57,113 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-11-23 20:27:57,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:27:57,114 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-11-23 20:27:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:57,114 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:27:57,114 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:27:57,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:27:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:27:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:27:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:27:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-23 20:27:57,118 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2019-11-23 20:27:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:57,119 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-23 20:27:57,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:27:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-23 20:27:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:27:57,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:57,119 INFO L410 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:57,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:57,320 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1798601744, now seen corresponding path program 28 times [2019-11-23 20:27:57,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:57,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034368336] [2019-11-23 20:27:57,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:57,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034368336] [2019-11-23 20:27:57,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630223911] [2019-11-23 20:27:57,866 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 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 [2019-11-23 20:27:57,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:57,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:57,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:27:57,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:57,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:57,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:27:57,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128954024] [2019-11-23 20:27:57,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:27:57,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:27:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:27:57,926 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2019-11-23 20:27:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:57,973 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-23 20:27:57,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:27:57,973 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-11-23 20:27:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:57,974 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:27:57,974 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:27:57,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:27:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:27:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 20:27:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:27:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-11-23 20:27:57,977 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2019-11-23 20:27:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:57,978 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-11-23 20:27:57,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:27:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-11-23 20:27:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:27:57,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:57,978 INFO L410 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:58,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:58,182 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash -26444853, now seen corresponding path program 29 times [2019-11-23 20:27:58,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:58,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082284041] [2019-11-23 20:27:58,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:58,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082284041] [2019-11-23 20:27:58,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582615738] [2019-11-23 20:27:58,578 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 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 [2019-11-23 20:27:58,971 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 20:27:58,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:58,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:27:58,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:58,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:58,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:27:58,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522454478] [2019-11-23 20:27:58,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:27:58,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:58,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:27:58,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:27:58,989 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 33 states. [2019-11-23 20:27:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:59,072 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-23 20:27:59,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:27:59,072 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-11-23 20:27:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:59,073 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:27:59,073 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:27:59,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:27:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:27:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 20:27:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:27:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-23 20:27:59,075 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2019-11-23 20:27:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:59,076 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-23 20:27:59,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:27:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-23 20:27:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:27:59,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:59,076 INFO L410 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:59,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:59,277 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash -768314512, now seen corresponding path program 30 times [2019-11-23 20:27:59,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:59,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156705449] [2019-11-23 20:27:59,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:59,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156705449] [2019-11-23 20:27:59,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081117948] [2019-11-23 20:27:59,720 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 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 [2019-11-23 20:28:00,766 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 20:28:00,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:00,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:28:00,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:00,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:00,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:28:00,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308979908] [2019-11-23 20:28:00,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:28:00,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:28:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:28:00,784 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2019-11-23 20:28:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:00,850 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-23 20:28:00,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:28:00,850 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-11-23 20:28:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:00,851 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:28:00,851 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:28:00,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:28:00,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:28:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 20:28:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:28:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-23 20:28:00,854 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2019-11-23 20:28:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:00,854 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-23 20:28:00,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:28:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-23 20:28:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:28:00,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:00,855 INFO L410 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:01,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:01,060 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:01,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2003529835, now seen corresponding path program 31 times [2019-11-23 20:28:01,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:01,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518521461] [2019-11-23 20:28:01,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:01,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518521461] [2019-11-23 20:28:01,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074375228] [2019-11-23 20:28:01,479 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 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 [2019-11-23 20:28:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:01,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:28:01,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:01,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:01,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:28:01,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560216094] [2019-11-23 20:28:01,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:28:01,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:28:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:28:01,536 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 35 states. [2019-11-23 20:28:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:01,595 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2019-11-23 20:28:01,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:28:01,596 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-11-23 20:28:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:01,596 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:28:01,596 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:28:01,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:28:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:28:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 20:28:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:28:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-23 20:28:01,601 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2019-11-23 20:28:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:01,601 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-23 20:28:01,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:28:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-23 20:28:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:28:01,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:01,602 INFO L410 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:01,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:01,808 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2031358672, now seen corresponding path program 32 times [2019-11-23 20:28:01,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:01,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34613731] [2019-11-23 20:28:01,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:02,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34613731] [2019-11-23 20:28:02,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645956758] [2019-11-23 20:28:02,268 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 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 [2019-11-23 20:28:02,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:02,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:02,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:28:02,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:02,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:02,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:28:02,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152090492] [2019-11-23 20:28:02,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:28:02,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:28:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:28:02,325 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2019-11-23 20:28:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:02,394 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-23 20:28:02,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:28:02,394 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-11-23 20:28:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:02,394 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:28:02,395 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:28:02,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:28:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:28:02,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 20:28:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:28:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-11-23 20:28:02,397 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2019-11-23 20:28:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:02,397 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-11-23 20:28:02,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:28:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-11-23 20:28:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:28:02,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:02,398 INFO L410 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:02,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:02,598 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1400914677, now seen corresponding path program 33 times [2019-11-23 20:28:02,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:02,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057904470] [2019-11-23 20:28:02,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:03,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057904470] [2019-11-23 20:28:03,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308656460] [2019-11-23 20:28:03,118 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:06,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 20:28:06,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:06,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:28:06,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:06,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:06,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:28:06,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559363301] [2019-11-23 20:28:06,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:28:06,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:06,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:28:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:28:06,759 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2019-11-23 20:28:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:06,829 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-11-23 20:28:06,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:28:06,830 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-11-23 20:28:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:06,831 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:28:06,831 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:28:06,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:28:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:28:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:28:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:28:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-23 20:28:06,834 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2019-11-23 20:28:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:06,835 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-23 20:28:06,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:28:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-23 20:28:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:28:06,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:06,835 INFO L410 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:07,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:07,042 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:07,043 INFO L82 PathProgramCache]: Analyzing trace with hash -427206096, now seen corresponding path program 34 times [2019-11-23 20:28:07,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:07,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60805005] [2019-11-23 20:28:07,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:07,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60805005] [2019-11-23 20:28:07,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405746659] [2019-11-23 20:28:07,888 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:07,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:07,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:07,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:28:07,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:07,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:07,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:28:07,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955652595] [2019-11-23 20:28:07,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:28:07,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:28:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:28:07,958 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2019-11-23 20:28:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:08,012 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-23 20:28:08,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:28:08,013 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-11-23 20:28:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:08,013 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:28:08,013 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:28:08,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:28:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:28:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-23 20:28:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:28:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-11-23 20:28:08,016 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2019-11-23 20:28:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:08,017 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-11-23 20:28:08,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:28:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-11-23 20:28:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:28:08,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:08,018 INFO L410 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:08,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,221 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:08,221 INFO L82 PathProgramCache]: Analyzing trace with hash -307011157, now seen corresponding path program 35 times [2019-11-23 20:28:08,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:08,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617666020] [2019-11-23 20:28:08,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:08,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617666020] [2019-11-23 20:28:08,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568611622] [2019-11-23 20:28:08,807 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,948 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 20:28:09,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:09,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:28:09,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:09,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:09,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:28:09,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033625014] [2019-11-23 20:28:09,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:28:09,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:09,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:28:09,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:28:09,969 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 39 states. [2019-11-23 20:28:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:10,033 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-11-23 20:28:10,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:28:10,034 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-11-23 20:28:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:10,035 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:28:10,035 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:28:10,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:28:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:28:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 20:28:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:28:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-23 20:28:10,038 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2019-11-23 20:28:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:10,038 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-23 20:28:10,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:28:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-23 20:28:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:28:10,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:10,038 INFO L410 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:10,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:10,239 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash -875935344, now seen corresponding path program 36 times [2019-11-23 20:28:10,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:10,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309656137] [2019-11-23 20:28:10,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:10,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309656137] [2019-11-23 20:28:10,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623375332] [2019-11-23 20:28:10,839 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:15,168 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:28:15,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:15,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:28:15,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:15,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:15,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:28:15,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642762499] [2019-11-23 20:28:15,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:28:15,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:15,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:28:15,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:28:15,196 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2019-11-23 20:28:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:15,238 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-23 20:28:15,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:28:15,239 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-11-23 20:28:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:15,240 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:28:15,240 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:28:15,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:28:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:28:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 20:28:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:28:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-23 20:28:15,245 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2019-11-23 20:28:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:15,245 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-23 20:28:15,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:28:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-23 20:28:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:28:15,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:15,246 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:15,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:15,448 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:15,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1332715957, now seen corresponding path program 37 times [2019-11-23 20:28:15,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:15,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108892960] [2019-11-23 20:28:15,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:16,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108892960] [2019-11-23 20:28:16,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13165504] [2019-11-23 20:28:16,533 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:16,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:28:16,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:16,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:16,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:28:16,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205569305] [2019-11-23 20:28:16,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:28:16,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:28:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:28:16,610 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 41 states. [2019-11-23 20:28:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:16,688 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2019-11-23 20:28:16,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:28:16,688 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-11-23 20:28:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:16,689 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:28:16,689 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:28:16,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:28:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:28:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:28:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:28:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-23 20:28:16,692 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2019-11-23 20:28:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:16,692 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-23 20:28:16,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:28:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-23 20:28:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:28:16,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:16,697 INFO L410 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:16,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:16,900 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1686954224, now seen corresponding path program 38 times [2019-11-23 20:28:16,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:16,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746236580] [2019-11-23 20:28:16,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:17,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746236580] [2019-11-23 20:28:17,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682893179] [2019-11-23 20:28:17,517 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:17,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:17,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:17,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:28:17,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:17,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:17,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:28:17,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5822188] [2019-11-23 20:28:17,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:28:17,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:17,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:28:17,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:28:17,581 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2019-11-23 20:28:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:17,622 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-23 20:28:17,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:28:17,623 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-11-23 20:28:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:17,623 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:28:17,623 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:28:17,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:28:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:28:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-23 20:28:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:28:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-11-23 20:28:17,627 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2019-11-23 20:28:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:17,628 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-11-23 20:28:17,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:28:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-11-23 20:28:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:28:17,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:17,628 INFO L410 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:17,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:17,831 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash 807449323, now seen corresponding path program 39 times [2019-11-23 20:28:17,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:17,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111440836] [2019-11-23 20:28:17,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:18,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111440836] [2019-11-23 20:28:18,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779067821] [2019-11-23 20:28:18,530 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:34,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 20:28:34,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:34,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:28:34,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:35,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:35,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:28:35,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657023371] [2019-11-23 20:28:35,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:28:35,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:35,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:28:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:28:35,019 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 43 states. [2019-11-23 20:28:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:35,083 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-11-23 20:28:35,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:28:35,084 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-11-23 20:28:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:35,085 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:28:35,085 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:28:35,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:28:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:28:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:28:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:28:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-23 20:28:35,088 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2019-11-23 20:28:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:35,088 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-23 20:28:35,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:28:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-23 20:28:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:28:35,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:35,089 INFO L410 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:35,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:35,297 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash -687398832, now seen corresponding path program 40 times [2019-11-23 20:28:35,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:35,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453936138] [2019-11-23 20:28:35,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:35,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453936138] [2019-11-23 20:28:35,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461635842] [2019-11-23 20:28:35,957 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:36,009 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:36,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:36,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:28:36,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:36,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:36,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 20:28:36,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121198864] [2019-11-23 20:28:36,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:28:36,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:28:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:28:36,027 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2019-11-23 20:28:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:36,081 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-23 20:28:36,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:28:36,081 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-11-23 20:28:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:36,082 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:28:36,082 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:28:36,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:28:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:28:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-23 20:28:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:28:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-11-23 20:28:36,085 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2019-11-23 20:28:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:36,085 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-11-23 20:28:36,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:28:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-11-23 20:28:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:28:36,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:36,086 INFO L410 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:36,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:36,289 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash 216948619, now seen corresponding path program 41 times [2019-11-23 20:28:36,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:36,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802135686] [2019-11-23 20:28:36,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:36,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802135686] [2019-11-23 20:28:36,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992938867] [2019-11-23 20:28:36,990 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:38,019 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 20:28:38,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:38,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:28:38,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:38,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:38,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 20:28:38,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128589350] [2019-11-23 20:28:38,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:28:38,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:38,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:28:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:28:38,040 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 45 states. [2019-11-23 20:28:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:38,104 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-23 20:28:38,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:28:38,105 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2019-11-23 20:28:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:38,106 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:28:38,106 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:28:38,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:28:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:28:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 20:28:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:28:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-23 20:28:38,110 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2019-11-23 20:28:38,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:38,110 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-23 20:28:38,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:28:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-23 20:28:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:28:38,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:38,111 INFO L410 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:38,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:38,317 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1813051472, now seen corresponding path program 42 times [2019-11-23 20:28:38,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:38,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423834219] [2019-11-23 20:28:38,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:28:39,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423834219] [2019-11-23 20:28:39,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678335831] [2019-11-23 20:28:39,209 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:18,779 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-11-23 20:29:18,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:18,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 20:29:18,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:18,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:18,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-11-23 20:29:18,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439746356] [2019-11-23 20:29:18,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:29:18,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:18,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:29:18,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:29:18,838 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2019-11-23 20:29:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:18,910 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-23 20:29:18,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:29:18,914 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2019-11-23 20:29:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:18,915 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:29:18,915 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:29:18,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:29:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:29:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:29:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:29:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-23 20:29:18,923 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2019-11-23 20:29:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:18,924 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-23 20:29:18,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:29:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-23 20:29:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:29:18,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:18,925 INFO L410 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:19,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:19,129 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:19,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:19,130 INFO L82 PathProgramCache]: Analyzing trace with hash -318544853, now seen corresponding path program 43 times [2019-11-23 20:29:19,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:19,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151951283] [2019-11-23 20:29:19,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:19,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151951283] [2019-11-23 20:29:19,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125772895] [2019-11-23 20:29:19,861 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:19,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:29:19,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:19,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:19,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-11-23 20:29:19,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194813746] [2019-11-23 20:29:19,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:29:19,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:29:19,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:29:19,928 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 47 states. [2019-11-23 20:29:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:19,990 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-23 20:29:19,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:29:19,991 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2019-11-23 20:29:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:19,991 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:29:19,991 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:29:19,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:29:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:29:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 20:29:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:29:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-11-23 20:29:19,995 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2019-11-23 20:29:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:19,996 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-11-23 20:29:19,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:29:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-11-23 20:29:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:29:19,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:19,997 INFO L410 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:20,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:20,200 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1233479920, now seen corresponding path program 44 times [2019-11-23 20:29:20,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:20,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298048728] [2019-11-23 20:29:20,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:20,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298048728] [2019-11-23 20:29:20,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620550335] [2019-11-23 20:29:20,983 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:21,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:21,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:21,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:29:21,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:21,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:21,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-11-23 20:29:21,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889518438] [2019-11-23 20:29:21,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:29:21,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:29:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:29:21,061 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2019-11-23 20:29:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:21,144 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-11-23 20:29:21,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:29:21,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2019-11-23 20:29:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:21,145 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:29:21,145 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:29:21,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:29:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:29:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-23 20:29:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:29:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-11-23 20:29:21,148 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2019-11-23 20:29:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:21,148 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-11-23 20:29:21,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:29:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-11-23 20:29:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:29:21,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:21,149 INFO L410 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:21,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:21,352 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash 468304075, now seen corresponding path program 45 times [2019-11-23 20:29:21,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:21,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567087614] [2019-11-23 20:29:21,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:22,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567087614] [2019-11-23 20:29:22,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649812610] [2019-11-23 20:29:22,452 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true