/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-crafted/mapavg1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:11:48,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:11:48,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:11:48,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:11:48,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:11:48,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:11:48,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:11:48,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:11:48,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:11:48,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:11:48,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:11:48,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:11:48,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:11:48,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:11:48,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:11:48,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:11:48,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:11:48,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:11:48,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:11:48,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:11:48,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:11:48,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:11:48,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:11:48,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:11:48,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:11:48,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:11:48,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:11:48,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:11:48,945 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 20:11:48,965 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:11:48,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:11:48,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:11:48,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:11:48,967 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:11:48,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:11:48,968 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:11:48,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:11:48,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:11:48,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:11:48,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:11:48,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:11:48,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:11:48,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:11:48,970 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:11:48,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:11:48,971 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:11:48,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:11:48,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:11:48,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:11:48,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:11:48,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:11:48,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:11:48,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:11:48,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:11:48,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:11:48,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:11:48,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:11:48,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:11:48,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:11:49,255 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:11:49,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:11:49,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:11:49,271 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:11:49,271 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:11:49,272 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg1.i [2019-11-23 20:11:49,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a09abddb/8f89dcae50cb409598f65716a4f25df2/FLAG6953a773a [2019-11-23 20:11:49,843 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:11:49,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg1.i [2019-11-23 20:11:49,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a09abddb/8f89dcae50cb409598f65716a4f25df2/FLAG6953a773a [2019-11-23 20:11:50,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a09abddb/8f89dcae50cb409598f65716a4f25df2 [2019-11-23 20:11:50,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:11:50,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:11:50,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:50,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:11:50,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:11:50,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634a231b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50, skipping insertion in model container [2019-11-23 20:11:50,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:11:50,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:11:50,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:50,504 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:11:50,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:50,542 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:11:50,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50 WrapperNode [2019-11-23 20:11:50,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:50,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:50,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:11:50,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:11:50,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:50,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:11:50,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:11:50,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:11:50,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (1/1) ... [2019-11-23 20:11:50,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:11:50,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:11:50,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:11:50,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:11:50,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (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 20:11:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:11:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:11:50,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:11:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:11:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:11:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:11:51,109 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:11:51,109 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:11:51,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:51 BoogieIcfgContainer [2019-11-23 20:11:51,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:11:51,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:11:51,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:11:51,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:11:51,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:11:50" (1/3) ... [2019-11-23 20:11:51,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa2b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:51, skipping insertion in model container [2019-11-23 20:11:51,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:50" (2/3) ... [2019-11-23 20:11:51,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa2b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:51, skipping insertion in model container [2019-11-23 20:11:51,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:51" (3/3) ... [2019-11-23 20:11:51,119 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2019-11-23 20:11:51,137 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:11:51,142 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:11:51,153 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:11:51,178 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:11:51,178 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:11:51,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:11:51,179 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:11:51,179 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:11:51,179 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:11:51,179 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:11:51,179 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:11:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:11:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:11:51,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:51,202 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:51,203 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:11:51,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:51,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183461236] [2019-11-23 20:11:51,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:51,383 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 20:11:51,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183461236] [2019-11-23 20:11:51,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:51,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:51,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433958111] [2019-11-23 20:11:51,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:51,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:51,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:51,406 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:11:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:51,448 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:11:51,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:51,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:11:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:51,459 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:11:51,459 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:11:51,463 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 20:11:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:11:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:11:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:11:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:11:51,496 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:11:51,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:51,497 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:11:51,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:11:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:11:51,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:51,498 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:51,499 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:11:51,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:51,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515646887] [2019-11-23 20:11:51,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:11:51,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515646887] [2019-11-23 20:11:51,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:51,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:51,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175391706] [2019-11-23 20:11:51,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:51,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:51,565 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:11:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:51,637 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:11:51,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:51,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:11:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:51,639 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:11:51,639 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:11:51,640 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 20:11:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:11:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:11:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:11:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:11:51,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:11:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:51,648 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:11:51,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:11:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:11:51,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:51,649 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:51,650 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:51,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:11:51,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:51,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715027938] [2019-11-23 20:11:51,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:51,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715027938] [2019-11-23 20:11:51,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:51,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:51,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792536643] [2019-11-23 20:11:51,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:51,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:51,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:51,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:51,754 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:11:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:51,779 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:11:51,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:51,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:11:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:51,782 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:11:51,782 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:11:51,783 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 20:11:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:11:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:11:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:11:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:11:51,796 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:11:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:51,796 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:11:51,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:11:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:11:51,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:51,799 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:51,800 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:11:51,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:51,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379842565] [2019-11-23 20:11:51,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:51,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379842565] [2019-11-23 20:11:51,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178809127] [2019-11-23 20:11:51,941 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 20:11:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:52,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:52,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:52,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:52,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:11:52,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304610244] [2019-11-23 20:11:52,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:11:52,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:52,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:11:52,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:11:52,059 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:11:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:52,102 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:11:52,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:11:52,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:11:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:52,104 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:11:52,104 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:11:52,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:11:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:11:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:11:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:11:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:11:52,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:11:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:52,118 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:11:52,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:11:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:11:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:11:52,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:52,121 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:52,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:52,325 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:11:52,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:52,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957056256] [2019-11-23 20:11:52,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:52,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957056256] [2019-11-23 20:11:52,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56415358] [2019-11-23 20:11:52,434 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 20:11:52,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:52,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:52,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:52,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:52,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:52,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:11:52,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663136850] [2019-11-23 20:11:52,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:11:52,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:11:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:52,562 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:11:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:52,639 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:11:52,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:11:52,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:11:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:52,644 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:11:52,644 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:11:52,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:11:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:11:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:11:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:11:52,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:11:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:52,654 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:11:52,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:11:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:11:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:11:52,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:52,657 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:52,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:52,862 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:52,862 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:11:52,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:52,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114876141] [2019-11-23 20:11:52,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:52,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114876141] [2019-11-23 20:11:52,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475753127] [2019-11-23 20:11:52,942 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 20:11:53,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:11:53,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:53,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:53,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:11:53,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:53,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:11:53,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701227017] [2019-11-23 20:11:53,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:11:53,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:11:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:53,030 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:11:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:53,146 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:11:53,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:11:53,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:11:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:53,148 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:11:53,148 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:11:53,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:11:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:11:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:11:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:11:53,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:11:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:53,163 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:11:53,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:11:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:11:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:11:53,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:53,167 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:53,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:53,368 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:11:53,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:53,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842805358] [2019-11-23 20:11:53,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:11:53,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842805358] [2019-11-23 20:11:53,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426536587] [2019-11-23 20:11:53,486 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 20:11:53,548 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:53,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:53,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:53,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:11:53,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:53,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:11:53,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722890553] [2019-11-23 20:11:53,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:11:53,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:11:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:53,591 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:11:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:53,713 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:11:53,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:53,713 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:11:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:53,714 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:11:53,714 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:11:53,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:53,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:11:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:11:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:11:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:11:53,723 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:11:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:53,723 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:11:53,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:11:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:11:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:11:53,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:53,725 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:53,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:53,928 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:11:53,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:53,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248497290] [2019-11-23 20:11:53,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:11:54,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248497290] [2019-11-23 20:11:54,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135038377] [2019-11-23 20:11:54,055 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 20:11:54,137 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:11:54,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:54,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:54,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:11:54,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:54,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:11:54,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554587261] [2019-11-23 20:11:54,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:54,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:54,202 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:11:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,327 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:11:54,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:54,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:11:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,329 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:11:54,329 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:11:54,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:11:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:11:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:11:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:11:54,343 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:11:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,344 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:11:54,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:11:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:11:54,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,346 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:54,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:54,547 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,548 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:11:54,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929596416] [2019-11-23 20:11:54,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:11:54,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929596416] [2019-11-23 20:11:54,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007599021] [2019-11-23 20:11:54,668 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 20:11:54,749 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:11:54,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:54,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:54,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:11:54,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:54,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:11:54,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181000408] [2019-11-23 20:11:54,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:54,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:54,792 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:11:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,857 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:11:54,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:54,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:11:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,859 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:11:54,859 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:11:54,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:11:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:11:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:11:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:11:54,866 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:11:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,866 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:11:54,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:11:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:11:54,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,868 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:55,069 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:11:55,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135150283] [2019-11-23 20:11:55,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:55,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135150283] [2019-11-23 20:11:55,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943422438] [2019-11-23 20:11:55,191 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 20:11:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:11:55,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:55,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:55,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:11:55,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474597804] [2019-11-23 20:11:55,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:11:55,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:11:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:11:55,295 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:11:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,331 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:11:55,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:55,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:11:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,332 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:11:55,333 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:11:55,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 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 20:11:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:11:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:11:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:11:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:11:55,347 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:11:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,347 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:11:55,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:11:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:11:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:11:55,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,349 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:55,560 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:11:55,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685270979] [2019-11-23 20:11:55,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:55,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685270979] [2019-11-23 20:11:55,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534433839] [2019-11-23 20:11:55,718 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 20:11:55,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:55,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:55,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:11:55,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:55,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:55,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:11:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226840903] [2019-11-23 20:11:55,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:55,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:55,827 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:11:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,867 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:11:55,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:11:55,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:11:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,868 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:11:55,868 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:11:55,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 20:11:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:11:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:11:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:11:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:11:55,880 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:11:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,881 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:11:55,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:11:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:11:55,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,882 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,094 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:11:56,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006820605] [2019-11-23 20:11:56,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:56,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006820605] [2019-11-23 20:11:56,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460359204] [2019-11-23 20:11:56,216 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 20:11:56,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:11:56,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:56,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:11:56,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:11:56,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711589197] [2019-11-23 20:11:56,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:11:56,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:11:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:11:56,379 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:11:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,469 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:11:56,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:11:56,470 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:11:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,471 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:11:56,471 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:11:56,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:11:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:11:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:11:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:11:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:11:56,485 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:11:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,485 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:11:56,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:11:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:11:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:11:56,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,487 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,696 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:11:56,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159601921] [2019-11-23 20:11:56,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:56,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159601921] [2019-11-23 20:11:56,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256180541] [2019-11-23 20:11:56,843 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 20:11:56,908 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:56,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:56,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:56,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:11:56,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593385973] [2019-11-23 20:11:56,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:11:56,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:11:56,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:11:56,941 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:11:56,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,998 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:11:57,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:11:57,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:11:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,001 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:11:57,001 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:11:57,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 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 20:11:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:11:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:11:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:11:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:11:57,011 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:11:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,012 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:11:57,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:11:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:11:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:11:57,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,015 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:57,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,227 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:11:57,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133821724] [2019-11-23 20:11:57,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:57,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133821724] [2019-11-23 20:11:57,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846307250] [2019-11-23 20:11:57,380 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 20:11:57,676 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:11:57,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:57,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:11:57,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:11:57,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894184697] [2019-11-23 20:11:57,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:11:57,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:11:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:11:57,758 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:11:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,888 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:11:57,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:11:57,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:11:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,889 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:11:57,889 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:11:57,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:11:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:11:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:11:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:11:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:11:57,896 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:11:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,897 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:11:57,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:11:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:11:57,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:11:57,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,898 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:58,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,103 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,104 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:11:58,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656665967] [2019-11-23 20:11:58,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:11:58,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656665967] [2019-11-23 20:11:58,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113703047] [2019-11-23 20:11:58,328 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 20:11:58,616 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:11:58,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 20:11:58,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:11:58,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394451146] [2019-11-23 20:11:58,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:11:58,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:11:58,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:11:58,705 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:11:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,771 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:11:58,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:11:58,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:11:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,772 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:11:58,772 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:11:58,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:11:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:11:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:11:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:11:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:11:58,778 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:11:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,778 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:11:58,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:11:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:11:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:11:58,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,779 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:58,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,984 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:11:58,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286664496] [2019-11-23 20:11:58,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:11:59,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286664496] [2019-11-23 20:11:59,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784848598] [2019-11-23 20:11:59,131 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 20:11:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:11:59,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:11:59,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:59,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:11:59,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452376067] [2019-11-23 20:11:59,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:11:59,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:11:59,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:11:59,243 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:11:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,296 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:11:59,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:11:59,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:11:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,297 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:11:59,297 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:11:59,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 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 20:11:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:11:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:11:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:11:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:11:59,302 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:11:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,303 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:11:59,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:11:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:11:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:11:59,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,304 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:59,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,507 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:11:59,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815963666] [2019-11-23 20:11:59,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:11:59,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815963666] [2019-11-23 20:11:59,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020772639] [2019-11-23 20:11:59,715 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 20:11:59,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:59,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:59,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:11:59,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:11:59,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:59,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:11:59,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310621704] [2019-11-23 20:11:59,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:11:59,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:59,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:11:59,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:11:59,832 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:11:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,897 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:11:59,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:11:59,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:11:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,899 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:11:59,899 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:11:59,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 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 20:11:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:11:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:11:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:11:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:11:59,904 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:11:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,905 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:11:59,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:11:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:11:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:11:59,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,906 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,112 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:12:00,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578224233] [2019-11-23 20:12:00,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:00,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578224233] [2019-11-23 20:12:00,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994369129] [2019-11-23 20:12:00,298 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 20:12:00,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:12:00,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:00,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:12:00,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:12:00,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415358966] [2019-11-23 20:12:00,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:00,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:00,530 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:12:00,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,654 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:12:00,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:12:00,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:12:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,656 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:12:00,656 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:12:00,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:12:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:12:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:12:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:12:00,661 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:12:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,662 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:12:00,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:12:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:12:00,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,663 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,867 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,868 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:12:00,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102222982] [2019-11-23 20:12:00,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:12:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102222982] [2019-11-23 20:12:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139140666] [2019-11-23 20:12:01,081 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 20:12:01,163 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:01,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:01,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:12:01,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:12:01,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701427144] [2019-11-23 20:12:01,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:12:01,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:12:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:01,267 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:12:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:01,456 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:12:01,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:12:01,456 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:12:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:01,457 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:12:01,457 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:12:01,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:01,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:12:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:12:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:12:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:12:01,462 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:12:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:01,462 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:12:01,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:12:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:12:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:12:01,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:01,463 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,668 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,668 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:12:01,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352896221] [2019-11-23 20:12:01,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:12:01,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352896221] [2019-11-23 20:12:01,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031514807] [2019-11-23 20:12:01,884 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 20:12:02,977 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:12:02,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:02,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:02,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:12:03,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:03,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:12:03,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471738964] [2019-11-23 20:12:03,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:03,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:03,095 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:12:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:03,351 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:12:03,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:03,353 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:12:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:03,354 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:12:03,354 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:12:03,355 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:12:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:12:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:12:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:12:03,359 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:12:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:03,359 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:12:03,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:12:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:12:03,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:03,360 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:03,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:03,566 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:12:03,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:03,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500023006] [2019-11-23 20:12:03,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:03,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500023006] [2019-11-23 20:12:03,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945812734] [2019-11-23 20:12:03,828 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 20:12:04,393 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:12:04,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:04,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:12:04,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:12:04,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:04,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:12:04,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939610975] [2019-11-23 20:12:04,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:12:04,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:12:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:04,512 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:12:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:04,587 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:12:04,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:12:04,588 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:12:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:04,589 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:12:04,589 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:12:04,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:12:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:12:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:12:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:12:04,595 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:12:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:04,595 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:12:04,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:12:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:12:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:12:04,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:04,596 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:04,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,802 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:12:04,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:04,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583893547] [2019-11-23 20:12:04,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:05,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583893547] [2019-11-23 20:12:05,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060629875] [2019-11-23 20:12:05,046 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 20:12:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:05,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:12:05,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:05,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:05,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:12:05,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031133735] [2019-11-23 20:12:05,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:12:05,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:12:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:05,161 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:12:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:05,224 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:12:05,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:12:05,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:12:05,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:05,228 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:12:05,228 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:12:05,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:12:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:12:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:12:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:12:05,236 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:12:05,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:05,236 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:12:05,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:12:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:12:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:12:05,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:05,237 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:05,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,440 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:12:05,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:05,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361299329] [2019-11-23 20:12:05,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:05,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361299329] [2019-11-23 20:12:05,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650882270] [2019-11-23 20:12:05,815 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 20:12:05,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:05,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:05,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:12:05,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:05,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:05,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:12:05,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661354933] [2019-11-23 20:12:05,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:05,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:05,983 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:12:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:06,067 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:12:06,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:12:06,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:12:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:06,068 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:12:06,068 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:12:06,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:12:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:12:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:12:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:12:06,073 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:12:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:06,073 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:12:06,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:12:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:12:06,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:06,074 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:06,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:06,278 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:12:06,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:06,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997836108] [2019-11-23 20:12:06,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:06,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997836108] [2019-11-23 20:12:06,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868288309] [2019-11-23 20:12:06,551 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 20:12:06,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:12:06,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:06,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:12:06,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-23 20:12:06,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:06,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:12:06,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729538270] [2019-11-23 20:12:06,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:12:06,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:06,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:12:06,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:06,844 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:12:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:07,061 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-11-23 20:12:07,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:12:07,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:12:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:07,063 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:12:07,063 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:12:07,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:12:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2019-11-23 20:12:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:12:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:12:07,067 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-11-23 20:12:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:07,068 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:12:07,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:12:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:12:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:12:07,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:07,069 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:07,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,271 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1756079898, now seen corresponding path program 22 times [2019-11-23 20:12:07,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:07,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607796316] [2019-11-23 20:12:07,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:07,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607796316] [2019-11-23 20:12:07,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135118893] [2019-11-23 20:12:07,602 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 20:12:07,720 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:07,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:07,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:12:07,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:07,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:07,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:12:07,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561058256] [2019-11-23 20:12:07,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:12:07,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:12:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:12:07,779 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 26 states. [2019-11-23 20:12:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:07,875 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:12:07,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:12:07,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-23 20:12:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:07,877 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:12:07,877 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:12:07,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 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 20:12:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:12:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 20:12:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:12:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:12:07,881 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2019-11-23 20:12:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:07,882 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:12:07,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:12:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:12:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:12:07,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:07,883 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:08,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,087 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 23 times [2019-11-23 20:12:08,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:08,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166221571] [2019-11-23 20:12:08,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:08,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166221571] [2019-11-23 20:12:08,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851265540] [2019-11-23 20:12:08,592 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 20:12:11,789 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:12:11,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:11,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:11,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-23 20:12:11,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:11,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:12:11,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163184148] [2019-11-23 20:12:11,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:11,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:11,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:11,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:11,935 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 35 states. [2019-11-23 20:12:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:12,182 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2019-11-23 20:12:12,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:12,183 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 20:12:12,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:12,184 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:12:12,184 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:12:12,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:12:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-23 20:12:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:12:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:12:12,189 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2019-11-23 20:12:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:12,190 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:12:12,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:12:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:12:12,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:12,192 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:12,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:12,399 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash 613383828, now seen corresponding path program 24 times [2019-11-23 20:12:12,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:12,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75464538] [2019-11-23 20:12:12,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 20:12:12,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75464538] [2019-11-23 20:12:12,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577345747] [2019-11-23 20:12:12,966 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 20:12:14,456 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:12:14,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:14,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:12:14,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-11-23 20:12:14,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:14,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:12:14,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684875992] [2019-11-23 20:12:14,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:14,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:14,606 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 35 states. [2019-11-23 20:12:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:14,755 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2019-11-23 20:12:14,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:14,755 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-11-23 20:12:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:14,756 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:12:14,756 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:12:14,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:12:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-23 20:12:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:12:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:12:14,759 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 133 [2019-11-23 20:12:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:14,760 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:12:14,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:12:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:12:14,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:14,761 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:14,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:14,966 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840464, now seen corresponding path program 25 times [2019-11-23 20:12:14,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:14,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049812157] [2019-11-23 20:12:14,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:15,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049812157] [2019-11-23 20:12:15,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087907029] [2019-11-23 20:12:15,464 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 20:12:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:15,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:12:15,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:15,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:15,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:12:15,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912856400] [2019-11-23 20:12:15,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:12:15,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:12:15,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:12:15,635 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 29 states. [2019-11-23 20:12:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:15,723 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:12:15,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:12:15,724 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2019-11-23 20:12:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:15,725 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:12:15,725 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:12:15,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:12:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:12:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 20:12:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:12:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:12:15,729 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 20:12:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:15,730 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:12:15,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:12:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:12:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:12:15,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:15,731 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:15,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:15,936 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash -624080370, now seen corresponding path program 26 times [2019-11-23 20:12:15,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:15,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071914835] [2019-11-23 20:12:15,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:16,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071914835] [2019-11-23 20:12:16,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296430176] [2019-11-23 20:12:16,396 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 20:12:16,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:16,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:16,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:12:16,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:16,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:16,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:12:16,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122329413] [2019-11-23 20:12:16,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:12:16,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:16,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:12:16,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:16,552 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 30 states. [2019-11-23 20:12:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:16,656 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:12:16,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:12:16,657 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:12:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:16,658 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:12:16,658 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:12:16,658 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 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 20:12:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:12:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:12:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:12:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:12:16,664 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2019-11-23 20:12:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:16,664 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:12:16,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:12:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:12:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:12:16,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:16,666 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:16,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:16,869 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1167081420, now seen corresponding path program 27 times [2019-11-23 20:12:16,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:16,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645977126] [2019-11-23 20:12:16,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:17,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645977126] [2019-11-23 20:12:17,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118418958] [2019-11-23 20:12:17,291 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 20:12:17,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:12:17,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:17,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:17,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-11-23 20:12:17,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:17,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:12:17,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627024345] [2019-11-23 20:12:17,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:12:17,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:17,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:12:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:12:17,840 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 39 states. [2019-11-23 20:12:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:18,034 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2019-11-23 20:12:18,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:12:18,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 141 [2019-11-23 20:12:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:18,036 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:12:18,036 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:12:18,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:12:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:12:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2019-11-23 20:12:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:12:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:12:18,041 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 141 [2019-11-23 20:12:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:18,042 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:12:18,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:12:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:12:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:12:18,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:18,043 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:18,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:18,246 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1782074872, now seen corresponding path program 28 times [2019-11-23 20:12:18,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:18,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029797600] [2019-11-23 20:12:18,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:12:18,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029797600] [2019-11-23 20:12:18,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568375599] [2019-11-23 20:12:18,735 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:12:18,832 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:18,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:18,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:12:18,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:12:18,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:18,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:12:18,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125052368] [2019-11-23 20:12:18,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:12:18,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:12:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:18,869 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 32 states. [2019-11-23 20:12:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:18,972 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:12:18,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:12:18,973 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 20:12:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:18,974 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:12:18,974 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:12:18,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:12:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:12:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:12:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:12:18,979 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:12:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:18,980 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:12:18,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:12:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:12:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:12:18,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:18,981 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:19,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:19,185 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 29 times [2019-11-23 20:12:19,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:19,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801227958] [2019-11-23 20:12:19,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:12:19,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801227958] [2019-11-23 20:12:19,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826217231] [2019-11-23 20:12:19,798 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 20:12:23,050 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:12:23,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:23,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:23,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2019-11-23 20:12:23,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:23,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:12:23,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507551138] [2019-11-23 20:12:23,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:12:23,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:12:23,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:12:23,245 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 42 states. [2019-11-23 20:12:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:23,600 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:12:23,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:12:23,600 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 147 [2019-11-23 20:12:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:23,602 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:12:23,602 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:12:23,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:12:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:12:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:12:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:12:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:12:23,609 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:12:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:23,609 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:12:23,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:12:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:12:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:12:23,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:23,610 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:23,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:23,816 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash 300865538, now seen corresponding path program 30 times [2019-11-23 20:12:23,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:23,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395138834] [2019-11-23 20:12:23,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:24,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395138834] [2019-11-23 20:12:24,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623211957] [2019-11-23 20:12:24,299 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 20:12:27,137 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:12:27,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:27,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:27,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-11-23 20:12:27,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:27,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:12:27,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191439225] [2019-11-23 20:12:27,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:12:27,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:27,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:12:27,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:27,351 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:12:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:27,542 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:12:27,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:12:27,542 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:12:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:27,544 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:12:27,544 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:12:27,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:12:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:12:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:12:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:12:27,550 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:12:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:27,550 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:12:27,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:12:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:12:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:12:27,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:27,551 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:27,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:27,758 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:27,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1309958206, now seen corresponding path program 31 times [2019-11-23 20:12:27,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:27,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101048290] [2019-11-23 20:12:27,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:28,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101048290] [2019-11-23 20:12:28,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64835363] [2019-11-23 20:12:28,259 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 20:12:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:28,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:12:28,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:28,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:28,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:12:28,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193762159] [2019-11-23 20:12:28,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:28,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:28,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:28,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:28,396 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 35 states. [2019-11-23 20:12:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:28,513 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:12:28,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:12:28,513 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 20:12:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:28,514 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:12:28,514 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:12:28,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:12:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:12:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:12:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:12:28,520 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:12:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:28,522 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:12:28,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:12:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:12:28,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:28,524 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:28,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:28,727 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172420, now seen corresponding path program 32 times [2019-11-23 20:12:28,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:28,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859314456] [2019-11-23 20:12:28,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:29,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859314456] [2019-11-23 20:12:29,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673893451] [2019-11-23 20:12:29,507 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 20:12:29,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:29,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:29,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:12:29,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:29,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:29,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:12:29,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837655520] [2019-11-23 20:12:29,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:12:29,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:12:29,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:29,662 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 36 states. [2019-11-23 20:12:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:29,784 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:12:29,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:29,789 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2019-11-23 20:12:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:29,790 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:12:29,790 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:12:29,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:12:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:12:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:12:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:12:29,795 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:12:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:29,796 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:12:29,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:12:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:12:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:12:29,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:29,797 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:30,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:30,000 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash 370015802, now seen corresponding path program 33 times [2019-11-23 20:12:30,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:30,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174622145] [2019-11-23 20:12:30,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:30,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174622145] [2019-11-23 20:12:30,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658623619] [2019-11-23 20:12:30,722 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 20:12:30,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:12:30,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:30,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:12:30,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 19 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2019-11-23 20:12:31,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:31,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 15] total 49 [2019-11-23 20:12:31,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086536627] [2019-11-23 20:12:31,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:12:31,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:31,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:12:31,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=1640, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:31,246 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 49 states. [2019-11-23 20:12:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:31,998 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2019-11-23 20:12:31,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-23 20:12:31,999 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 163 [2019-11-23 20:12:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:32,000 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:12:32,001 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:12:32,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=866, Invalid=2674, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:12:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:12:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 20:12:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:12:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 20:12:32,007 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 20:12:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:32,008 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 20:12:32,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:12:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 20:12:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:12:32,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:32,009 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:32,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:32,211 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:32,212 INFO L82 PathProgramCache]: Analyzing trace with hash -257617674, now seen corresponding path program 34 times [2019-11-23 20:12:32,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:32,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883879784] [2019-11-23 20:12:32,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:12:33,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883879784] [2019-11-23 20:12:33,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108052477] [2019-11-23 20:12:33,076 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 20:12:33,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:33,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:33,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:12:33,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2019-11-23 20:12:33,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:33,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2019-11-23 20:12:33,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347182269] [2019-11-23 20:12:33,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:12:33,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:12:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:33,498 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 49 states. [2019-11-23 20:12:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:33,923 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:12:33,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:12:33,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2019-11-23 20:12:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:33,925 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:12:33,925 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:12:33,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:12:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2019-11-23 20:12:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:12:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 20:12:33,931 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2019-11-23 20:12:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:33,932 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 20:12:33,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:12:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 20:12:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:12:33,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:33,933 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:34,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:34,137 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1138775886, now seen corresponding path program 35 times [2019-11-23 20:12:34,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:34,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211988053] [2019-11-23 20:12:34,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:12:34,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211988053] [2019-11-23 20:12:34,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590182227] [2019-11-23 20:12:34,920 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 20:13:06,256 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:13:06,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:06,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:13:06,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1613 trivial. 0 not checked. [2019-11-23 20:13:06,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:06,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 15] total 51 [2019-11-23 20:13:06,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201547146] [2019-11-23 20:13:06,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:13:06,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:13:06,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:06,556 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 51 states. [2019-11-23 20:13:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:06,962 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2019-11-23 20:13:06,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:13:06,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 179 [2019-11-23 20:13:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:06,964 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:13:06,964 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:13:06,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:13:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-11-23 20:13:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:13:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:13:06,971 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2019-11-23 20:13:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:06,972 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:13:06,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:13:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:13:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:13:06,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:06,973 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:07,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:07,186 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash -556563090, now seen corresponding path program 36 times [2019-11-23 20:13:07,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:07,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123541919] [2019-11-23 20:13:07,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2019-11-23 20:13:07,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123541919] [2019-11-23 20:13:07,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925005126] [2019-11-23 20:13:07,818 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 20:13:10,628 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:13:10,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:10,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:13:10,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1803 trivial. 0 not checked. [2019-11-23 20:13:10,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:10,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 20:13:10,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762588560] [2019-11-23 20:13:10,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:13:10,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:10,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:13:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:13:10,885 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 50 states. [2019-11-23 20:13:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:11,111 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2019-11-23 20:13:11,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:13:11,112 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 187 [2019-11-23 20:13:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:11,113 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:13:11,113 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 20:13:11,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:13:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 20:13:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2019-11-23 20:13:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:13:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 20:13:11,119 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 187 [2019-11-23 20:13:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:11,119 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 20:13:11,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:13:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 20:13:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:13:11,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:11,121 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:11,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:11,328 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1061272234, now seen corresponding path program 37 times [2019-11-23 20:13:11,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:11,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179572467] [2019-11-23 20:13:11,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:12,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179572467] [2019-11-23 20:13:12,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004827] [2019-11-23 20:13:12,077 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 20:13:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:12,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:13:12,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:12,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:12,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:13:12,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592892619] [2019-11-23 20:13:12,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:13:12,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:12,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:13:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:13:12,259 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 41 states. [2019-11-23 20:13:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:12,413 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2019-11-23 20:13:12,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:13:12,414 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2019-11-23 20:13:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:12,416 INFO L225 Difference]: With dead ends: 310 [2019-11-23 20:13:12,416 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:13:12,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:13:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:13:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 20:13:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:13:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:13:12,430 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2019-11-23 20:13:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:12,430 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:13:12,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:13:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:13:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:13:12,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:12,441 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:12,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:12,646 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 712240488, now seen corresponding path program 38 times [2019-11-23 20:13:12,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:12,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977461484] [2019-11-23 20:13:12,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:13,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977461484] [2019-11-23 20:13:13,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892751416] [2019-11-23 20:13:13,423 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 20:13:13,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:13,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:13,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:13:13,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:13,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:13,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:13:13,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636351587] [2019-11-23 20:13:13,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:13:13,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:13:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:13:13,608 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 42 states. [2019-11-23 20:13:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:13,760 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2019-11-23 20:13:13,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:13:13,760 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 193 [2019-11-23 20:13:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:13,762 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:13:13,762 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 20:13:13,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:13:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 20:13:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 20:13:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:13:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 20:13:13,771 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2019-11-23 20:13:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:13,771 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 20:13:13,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:13:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 20:13:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 20:13:13,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:13,774 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:13,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:13,979 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:13,979 INFO L82 PathProgramCache]: Analyzing trace with hash 300181670, now seen corresponding path program 39 times [2019-11-23 20:13:13,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:13,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002791544] [2019-11-23 20:13:13,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:13:14,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002791544] [2019-11-23 20:13:14,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492580872] [2019-11-23 20:13:14,812 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 20:13:15,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:13:15,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:15,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:13:15,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-11-23 20:13:15,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:15,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2019-11-23 20:13:15,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991304649] [2019-11-23 20:13:15,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:13:15,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:15,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:13:15,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:13:15,454 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 54 states. [2019-11-23 20:13:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:15,745 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-11-23 20:13:15,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:13:15,745 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 195 [2019-11-23 20:13:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:15,746 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:13:15,746 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:13:15,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:13:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:13:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 20:13:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 20:13:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 20:13:15,754 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 20:13:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:15,754 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 20:13:15,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:13:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 20:13:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 20:13:15,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:15,755 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:15,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:15,960 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1362128414, now seen corresponding path program 40 times [2019-11-23 20:13:15,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:15,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126312946] [2019-11-23 20:13:15,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-11-23 20:13:17,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126312946] [2019-11-23 20:13:17,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075684196] [2019-11-23 20:13:17,021 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 20:13:17,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:17,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:17,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:13:17,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2019-11-23 20:13:17,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:17,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 15] total 56 [2019-11-23 20:13:17,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039994317] [2019-11-23 20:13:17,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:13:17,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:13:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:13:17,496 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 56 states. [2019-11-23 20:13:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:17,784 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2019-11-23 20:13:17,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:13:17,785 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 199 [2019-11-23 20:13:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:17,786 INFO L225 Difference]: With dead ends: 323 [2019-11-23 20:13:17,786 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:13:17,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:13:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:13:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2019-11-23 20:13:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:13:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2019-11-23 20:13:17,793 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 199 [2019-11-23 20:13:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:17,793 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2019-11-23 20:13:17,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:13:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2019-11-23 20:13:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 20:13:17,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:17,795 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:17,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:17,998 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:17,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2033644258, now seen corresponding path program 41 times [2019-11-23 20:13:17,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:17,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090316902] [2019-11-23 20:13:17,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 20:13:18,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090316902] [2019-11-23 20:13:18,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711539210] [2019-11-23 20:13:18,839 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