/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/bor2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:10:08,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:10:08,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:10:08,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:10:08,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:10:08,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:10:08,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:10:08,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:10:08,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:10:08,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:10:08,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:10:08,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:10:08,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:10:08,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:10:08,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:10:08,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:10:08,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:10:08,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:10:08,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:10:08,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:10:08,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:10:08,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:10:08,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:10:08,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:10:08,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:10:08,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:10:08,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:10:08,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:10:08,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:10:08,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:10:08,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:10:08,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:10:08,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:10:08,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:10:08,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:10:08,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:10:08,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:10:08,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:10:08,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:10:08,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:10:08,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:10:08,994 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 20:10:09,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:10:09,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:10:09,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:10:09,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:10:09,015 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:10:09,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:10:09,015 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:10:09,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:10:09,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:10:09,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:10:09,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:10:09,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:10:09,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:10:09,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:10:09,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:10:09,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:10:09,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:10:09,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:10:09,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:10:09,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:10:09,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:10:09,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:10:09,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:10:09,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:10:09,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:10:09,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:10:09,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:10:09,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:10:09,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:10:09,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:10:09,313 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:10:09,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:10:09,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:10:09,331 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:10:09,331 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:10:09,332 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor2.i [2019-11-23 20:10:09,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c7fec97/a28cd5465aea412e990c0426763a3541/FLAGaacf24e15 [2019-11-23 20:10:09,850 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:10:09,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor2.i [2019-11-23 20:10:09,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c7fec97/a28cd5465aea412e990c0426763a3541/FLAGaacf24e15 [2019-11-23 20:10:10,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c7fec97/a28cd5465aea412e990c0426763a3541 [2019-11-23 20:10:10,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:10:10,258 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:10:10,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:10:10,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:10:10,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:10:10,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28facf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10, skipping insertion in model container [2019-11-23 20:10:10,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:10:10,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:10:10,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:10:10,480 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:10:10,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:10:10,516 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:10:10,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10 WrapperNode [2019-11-23 20:10:10,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:10:10,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:10:10,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:10:10,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:10:10,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:10:10,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:10:10,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:10:10,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:10:10,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:10:10,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:10:10,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:10:10,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:10:10,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (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 20:10:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:10:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:10:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:10:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:10:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:10:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:10:11,021 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:10:11,021 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:10:11,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:10:11 BoogieIcfgContainer [2019-11-23 20:10:11,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:10:11,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:10:11,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:10:11,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:10:11,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:10:10" (1/3) ... [2019-11-23 20:10:11,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e0d1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:10:11, skipping insertion in model container [2019-11-23 20:10:11,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (2/3) ... [2019-11-23 20:10:11,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e0d1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:10:11, skipping insertion in model container [2019-11-23 20:10:11,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:10:11" (3/3) ... [2019-11-23 20:10:11,030 INFO L109 eAbstractionObserver]: Analyzing ICFG bor2.i [2019-11-23 20:10:11,041 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:10:11,049 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:10:11,061 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:10:11,093 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:10:11,093 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:10:11,094 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:10:11,094 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:10:11,094 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:10:11,094 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:10:11,095 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:10:11,095 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:10:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:10:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:10:11,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,127 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 20:10:11,127 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:10:11,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616471642] [2019-11-23 20:10:11,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,325 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 20:10:11,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616471642] [2019-11-23 20:10:11,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338131650] [2019-11-23 20:10:11,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,345 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:10:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,390 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:10:11,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:10:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,401 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:10:11,401 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:10:11,405 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 20:10:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:10:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:10:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:10:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:10:11,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:10:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,439 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:10:11,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:10:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:10:11,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,441 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 20:10:11,441 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,442 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:10:11,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148158219] [2019-11-23 20:10:11,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,499 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 20:10:11,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148158219] [2019-11-23 20:10:11,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140120369] [2019-11-23 20:10:11,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,504 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:10:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,550 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:10:11,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:10:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,552 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:10:11,552 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:10:11,553 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 20:10:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:10:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:10:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:10:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:10:11,560 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:10:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,560 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:10:11,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:10:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:10:11,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,562 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 20:10:11,562 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:10:11,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952677562] [2019-11-23 20:10:11,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,667 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 20:10:11,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952677562] [2019-11-23 20:10:11,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010928158] [2019-11-23 20:10:11,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,670 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:10:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,691 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:10:11,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:10:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,693 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:10:11,693 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:10:11,694 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 20:10:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:10:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:10:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:10:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:10:11,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:10:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,701 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:10:11,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:10:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:10:11,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,702 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 20:10:11,703 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:10:11,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137923025] [2019-11-23 20:10:11,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,793 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 20:10:11,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137923025] [2019-11-23 20:10:11,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786901907] [2019-11-23 20:10:11,794 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 20:10:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:11,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:11,903 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 20:10:11,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:11,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:10:11,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876962906] [2019-11-23 20:10:11,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:10:11,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:10:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:10:11,906 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:10:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,941 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:10:11,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:10:11,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:10:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,942 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:10:11,943 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:10:11,943 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 20:10:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:10:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:10:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:10:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:10:11,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:10:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,951 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:10:11,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:10:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:10:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:10:11,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,955 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 20:10:12,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:12,161 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:12,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:10:12,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:12,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428895223] [2019-11-23 20:10:12,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:12,235 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 20:10:12,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428895223] [2019-11-23 20:10:12,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474056305] [2019-11-23 20:10:12,237 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 20:10:12,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:12,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:12,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:12,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:12,346 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 20:10:12,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:12,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:10:12,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920604119] [2019-11-23 20:10:12,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:10:12,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:10:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:10:12,349 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:10:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:12,399 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:10:12,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:10:12,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:10:12,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:12,403 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:10:12,403 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:10:12,404 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 20:10:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:10:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:10:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:10:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:10:12,409 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:10:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:12,410 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:10:12,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:10:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:10:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:10:12,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:12,411 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 20:10:12,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:12,620 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:12,621 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:10:12,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:12,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615131761] [2019-11-23 20:10:12,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:12,703 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 20:10:12,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615131761] [2019-11-23 20:10:12,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472021410] [2019-11-23 20:10:12,704 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 20:10:12,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:10:12,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:12,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:12,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:12,782 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 20:10:12,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:12,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:10:12,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046783946] [2019-11-23 20:10:12,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:10:12,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:12,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:10:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:10:12,788 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:10:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:12,904 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:10:12,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:10:12,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:10:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:12,905 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:10:12,905 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:10:12,906 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 20:10:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:10:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:10:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:10:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:10:12,921 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:10:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:12,923 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:10:12,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:10:12,923 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:10:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:10:12,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:12,924 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 20:10:13,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:13,127 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:10:13,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:13,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548717334] [2019-11-23 20:10:13,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:13,282 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 20:10:13,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548717334] [2019-11-23 20:10:13,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359039141] [2019-11-23 20:10:13,284 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 20:10:13,349 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:13,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:13,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:10:13,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:13,392 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 20:10:13,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:13,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:10:13,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762653903] [2019-11-23 20:10:13,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:10:13,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:13,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:10:13,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:10:13,396 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:10:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:13,531 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:10:13,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:10:13,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:10:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:13,532 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:10:13,532 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:10:13,533 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 20:10:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:10:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:10:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:10:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:10:13,544 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:10:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:13,544 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:10:13,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:10:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:10:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:10:13,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:13,547 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 20:10:13,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:13,760 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:10:13,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:13,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160680833] [2019-11-23 20:10:13,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:13,858 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 20:10:13,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160680833] [2019-11-23 20:10:13,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073526223] [2019-11-23 20:10:13,859 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 20:10:13,931 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:10:13,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:13,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:10:13,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:13,991 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 20:10:13,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:13,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:10:13,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069070459] [2019-11-23 20:10:13,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:13,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,008 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:10:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:14,123 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:10:14,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:10:14,123 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:10:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:14,124 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:10:14,124 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:10:14,125 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 20:10:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:10:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:10:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:10:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:10:14,139 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:10:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:14,140 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:10:14,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:10:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:10:14,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:14,141 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 20:10:14,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:14,345 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:14,346 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:10:14,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:14,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895274300] [2019-11-23 20:10:14,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:14,490 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 20:10:14,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895274300] [2019-11-23 20:10:14,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617601736] [2019-11-23 20:10:14,491 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 20:10:14,560 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:10:14,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:14,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:10:14,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:14,600 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 20:10:14,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:14,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:10:14,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525383098] [2019-11-23 20:10:14,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:14,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,606 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:10:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:14,671 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:10:14,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:10:14,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:10:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:14,672 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:10:14,672 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:10:14,673 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 20:10:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:10:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:10:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:10:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:10:14,684 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:10:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:14,684 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:10:14,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:10:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:10:14,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:14,685 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 20:10:14,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:14,889 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:10:14,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:14,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726601543] [2019-11-23 20:10:14,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:14,997 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 20:10:14,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726601543] [2019-11-23 20:10:14,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121140976] [2019-11-23 20:10:14,998 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 20:10:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:15,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:15,101 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 20:10:15,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:15,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:10:15,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368379029] [2019-11-23 20:10:15,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:10:15,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:15,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:10:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:10:15,103 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:10:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:15,153 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:10:15,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:10:15,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:10:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:15,155 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:10:15,155 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:10:15,157 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 20:10:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:10:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:10:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:10:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:10:15,171 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:10:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:15,171 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:10:15,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:10:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:10:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:10:15,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:15,174 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 20:10:15,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:15,382 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:10:15,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:15,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031867006] [2019-11-23 20:10:15,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,503 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 20:10:15,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031867006] [2019-11-23 20:10:15,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411060401] [2019-11-23 20:10:15,504 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 20:10:15,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:15,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:15,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:15,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:15,583 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 20:10:15,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:15,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:10:15,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704973185] [2019-11-23 20:10:15,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:15,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:15,587 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:10:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:15,625 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:10:15,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:10:15,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:10:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:15,626 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:10:15,627 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:10:15,627 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 20:10:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:10:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:10:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:10:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:10:15,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:10:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:15,638 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:10:15,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:10:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:10:15,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:15,639 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 20:10:15,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:15,850 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:10:15,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:15,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115246649] [2019-11-23 20:10:15,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:16,013 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 20:10:16,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115246649] [2019-11-23 20:10:16,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372093021] [2019-11-23 20:10:16,014 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 20:10:16,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:10:16,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:16,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:10:16,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:16,154 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 20:10:16,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:16,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:10:16,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864538989] [2019-11-23 20:10:16,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:10:16,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:10:16,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:10:16,159 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:10:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:16,249 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:10:16,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:10:16,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:10:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:16,254 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:10:16,254 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:10:16,255 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 20:10:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:10:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:10:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:10:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:10:16,272 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:10:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:16,272 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:10:16,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:10:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:10:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:10:16,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:16,273 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 20:10:16,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:16,480 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:10:16,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:16,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872453918] [2019-11-23 20:10:16,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:16,633 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 20:10:16,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872453918] [2019-11-23 20:10:16,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527649088] [2019-11-23 20:10:16,633 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 20:10:16,714 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:16,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:16,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:10:16,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:16,736 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 20:10:16,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:16,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:10:16,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927853581] [2019-11-23 20:10:16,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:10:16,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:16,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:10:16,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:10:16,738 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:10:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:16,779 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:10:16,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:10:16,780 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:10:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:16,781 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:10:16,781 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:10:16,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:10:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:10:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:10:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:10:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:10:16,791 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:10:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:16,791 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:10:16,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:10:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:10:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:10:16,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:16,792 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 20:10:16,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:16,996 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:10:16,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:16,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209210289] [2019-11-23 20:10:16,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:17,149 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 20:10:17,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209210289] [2019-11-23 20:10:17,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66619538] [2019-11-23 20:10:17,150 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 20:10:17,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:10:17,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:17,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:10:17,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:17,480 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 20:10:17,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:17,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:10:17,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790419618] [2019-11-23 20:10:17,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:10:17,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:10:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:10:17,482 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:10:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:17,606 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:10:17,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:10:17,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:10:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:17,607 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:10:17,607 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:10:17,608 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 20:10:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:10:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:10:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:10:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:10:17,617 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:10:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:17,617 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:10:17,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:10:17,618 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:10:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:10:17,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:17,619 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 20:10:17,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:17,822 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:10:17,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:17,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32494066] [2019-11-23 20:10:17,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:17,971 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 20:10:17,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32494066] [2019-11-23 20:10:17,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653224148] [2019-11-23 20:10:17,972 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 20:10:18,268 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:10:18,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:18,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:10:18,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:18,347 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 20:10:18,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:18,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:10:18,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990165021] [2019-11-23 20:10:18,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:10:18,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:10:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:10:18,349 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:10:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:18,411 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:10:18,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:10:18,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:10:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:18,412 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:10:18,412 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:10:18,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:10:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:10:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:10:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:10:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:10:18,418 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:10:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:18,418 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:10:18,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:10:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:10:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:10:18,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:18,419 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 20:10:18,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:18,624 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:10:18,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:18,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782486793] [2019-11-23 20:10:18,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:18,797 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 20:10:18,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782486793] [2019-11-23 20:10:18,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279192320] [2019-11-23 20:10:18,798 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 20:10:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:18,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:10:18,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:18,895 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 20:10:18,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:18,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:10:18,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321211930] [2019-11-23 20:10:18,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:10:18,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:18,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:10:18,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:10:18,897 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:10:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:18,947 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:10:18,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:10:18,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:10:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:18,949 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:10:18,949 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:10:18,950 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 20:10:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:10:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:10:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:10:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:10:18,954 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:10:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:18,954 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:10:18,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:10:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:10:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:10:18,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:18,956 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 20:10:19,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:19,160 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:10:19,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:19,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484430305] [2019-11-23 20:10:19,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:19,337 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 20:10:19,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484430305] [2019-11-23 20:10:19,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631593688] [2019-11-23 20:10:19,338 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 20:10:19,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:19,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:19,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:10:19,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:19,434 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 20:10:19,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:19,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:10:19,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498826178] [2019-11-23 20:10:19,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:10:19,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:10:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:10:19,437 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:10:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:19,494 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:10:19,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:10:19,494 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:10:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:19,495 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:10:19,495 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:10:19,496 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 20:10:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:10:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:10:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:10:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:10:19,501 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:10:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:19,501 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:10:19,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:10:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:10:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:10:19,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:19,502 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 20:10:19,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:19,713 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:10:19,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:19,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38251640] [2019-11-23 20:10:19,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:19,889 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 20:10:19,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38251640] [2019-11-23 20:10:19,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437158115] [2019-11-23 20:10:19,890 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 20:10:20,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:10:20,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:20,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:10:20,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:20,106 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 20:10:20,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:20,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:10:20,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177966143] [2019-11-23 20:10:20,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:10:20,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:10:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:20,108 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:10:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:20,216 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:10:20,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:10:20,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:10:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:20,217 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:10:20,217 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:10:20,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:10:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:10:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:10:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:10:20,223 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:10:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:20,223 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:10:20,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:10:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:10:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:10:20,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:20,224 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 20:10:20,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:20,428 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:10:20,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:20,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55948068] [2019-11-23 20:10:20,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:20,657 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 20:10:20,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55948068] [2019-11-23 20:10:20,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480142185] [2019-11-23 20:10:20,658 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 20:10:20,739 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:20,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:20,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:10:20,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:20,882 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 20:10:20,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:20,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:10:20,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199989019] [2019-11-23 20:10:20,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:10:20,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:20,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:10:20,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:10:20,886 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:10:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:21,089 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:10:21,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:10:21,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:10:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:21,090 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:10:21,090 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:10:21,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:10:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:10:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:10:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:10:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:10:21,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:10:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:21,095 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:10:21,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:10:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:10:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:10:21,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:21,096 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 20:10:21,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:21,301 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:10:21,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:21,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80176721] [2019-11-23 20:10:21,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:21,510 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 20:10:21,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80176721] [2019-11-23 20:10:21,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945883173] [2019-11-23 20:10:21,511 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 20:10:23,335 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:10:23,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:23,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:10:23,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:23,450 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 20:10:23,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:23,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:10:23,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322813269] [2019-11-23 20:10:23,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:10:23,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:23,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:10:23,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:10:23,452 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:10:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:23,678 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:10:23,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:10:23,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:10:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:23,680 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:10:23,680 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:10:23,681 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 20:10:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:10:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:10:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:10:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:10:23,686 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:10:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:23,686 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:10:23,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:10:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:10:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:10:23,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:23,687 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 20:10:23,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:23,899 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:10:23,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:23,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031906951] [2019-11-23 20:10:23,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:24,107 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 20:10:24,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031906951] [2019-11-23 20:10:24,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420080020] [2019-11-23 20:10:24,108 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 20:10:24,588 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:10:24,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:24,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:24,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:24,725 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 20:10:24,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:24,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:10:24,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289380943] [2019-11-23 20:10:24,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:10:24,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:10:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:10:24,727 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:10:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:24,822 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:10:24,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:10:24,822 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:10:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:24,823 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:10:24,823 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:10:24,824 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 20:10:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:10:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:10:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:10:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:10:24,829 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:10:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:24,829 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:10:24,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:10:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:10:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:10:24,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:24,830 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 20:10:25,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:25,035 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:25,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:10:25,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:25,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755547036] [2019-11-23 20:10:25,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:25,286 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 20:10:25,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755547036] [2019-11-23 20:10:25,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210488380] [2019-11-23 20:10:25,286 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 20:10:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:25,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:10:25,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:25,391 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 20:10:25,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:25,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:10:25,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614737498] [2019-11-23 20:10:25,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:10:25,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:10:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:25,393 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:10:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:25,457 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:10:25,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:10:25,459 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:10:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:25,460 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:10:25,460 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:10:25,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:10:25,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:10:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:10:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:10:25,466 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:10:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:25,466 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:10:25,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:10:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:10:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:10:25,467 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:25,467 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 20:10:25,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:25,671 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:25,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:10:25,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:25,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582237622] [2019-11-23 20:10:25,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:25,970 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 20:10:25,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582237622] [2019-11-23 20:10:25,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037066003] [2019-11-23 20:10:25,972 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 20:10:26,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:26,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:26,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:10:26,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:26,093 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 20:10:26,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:26,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:10:26,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070721618] [2019-11-23 20:10:26,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:10:26,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:26,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:10:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:26,099 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:10:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:26,202 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:10:26,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:10:26,203 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:10:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:26,204 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:10:26,204 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:10:26,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:10:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:10:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:10:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:10:26,212 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:10:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:26,213 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:10:26,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:10:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:10:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:10:26,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:26,215 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 20:10:26,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:26,420 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:10:26,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:26,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060189632] [2019-11-23 20:10:26,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:26,727 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 20:10:26,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060189632] [2019-11-23 20:10:26,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197234658] [2019-11-23 20:10:26,727 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 20:10:26,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:10:26,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:26,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:26,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:27,012 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 20:10:27,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:27,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:10:27,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805672755] [2019-11-23 20:10:27,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:10:27,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:10:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:27,015 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:10:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:27,265 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-11-23 20:10:27,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:10:27,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:10:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:27,266 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:10:27,266 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:10:27,267 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 20:10:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:10:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2019-11-23 20:10:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:10:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:10:27,271 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-11-23 20:10:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:27,271 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:10:27,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:10:27,272 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:10:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:10:27,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:27,273 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 20:10:27,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:27,477 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1756079898, now seen corresponding path program 22 times [2019-11-23 20:10:27,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:27,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266195682] [2019-11-23 20:10:27,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:27,814 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 20:10:27,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266195682] [2019-11-23 20:10:27,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146925004] [2019-11-23 20:10:27,816 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 20:10:27,933 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:27,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:27,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:10:27,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:27,982 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 20:10:27,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:27,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:10:27,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871705099] [2019-11-23 20:10:27,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:10:27,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:10:27,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:10:27,985 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 26 states. [2019-11-23 20:10:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:28,095 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:10:28,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:10:28,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-23 20:10:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:28,097 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:10:28,097 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:10:28,098 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 20:10:28,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:10:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 20:10:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:10:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:10:28,104 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2019-11-23 20:10:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:28,105 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:10:28,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:10:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:10:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:10:28,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:28,107 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 20:10:28,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:28,312 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 23 times [2019-11-23 20:10:28,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:28,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201098985] [2019-11-23 20:10:28,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:28,676 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 20:10:28,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201098985] [2019-11-23 20:10:28,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622304905] [2019-11-23 20:10:28,677 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 20:10:32,885 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:10:32,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:32,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:32,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:33,052 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 20:10:33,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:33,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:10:33,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869512636] [2019-11-23 20:10:33,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:10:33,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:33,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:10:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:33,054 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 35 states. [2019-11-23 20:10:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:33,347 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2019-11-23 20:10:33,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:10:33,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 20:10:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:33,349 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:10:33,349 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:10:33,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:10:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-23 20:10:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:10:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:10:33,355 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2019-11-23 20:10:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:33,355 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:10:33,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:10:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:10:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:10:33,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:33,356 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 20:10:33,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:33,563 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash 613383828, now seen corresponding path program 24 times [2019-11-23 20:10:33,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:33,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117089187] [2019-11-23 20:10:33,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:33,926 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 20:10:33,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117089187] [2019-11-23 20:10:33,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944814243] [2019-11-23 20:10:33,926 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 20:10:35,908 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:10:35,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:35,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:35,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:36,053 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 20:10:36,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:36,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:10:36,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882158200] [2019-11-23 20:10:36,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:10:36,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:10:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:36,055 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 35 states. [2019-11-23 20:10:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:36,184 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2019-11-23 20:10:36,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:10:36,184 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-11-23 20:10:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:36,185 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:10:36,185 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:10:36,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:10:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-23 20:10:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:10:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:10:36,191 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 133 [2019-11-23 20:10:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:36,191 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:10:36,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:10:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:10:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:10:36,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:36,192 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 20:10:36,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:36,393 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:36,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840464, now seen corresponding path program 25 times [2019-11-23 20:10:36,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:36,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344901020] [2019-11-23 20:10:36,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:36,878 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 20:10:36,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344901020] [2019-11-23 20:10:36,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16422484] [2019-11-23 20:10:36,879 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 20:10:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:36,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:10:36,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:37,005 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 20:10:37,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:37,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:10:37,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850988350] [2019-11-23 20:10:37,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:10:37,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:37,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:10:37,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:10:37,008 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 29 states. [2019-11-23 20:10:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:37,094 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:10:37,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:10:37,094 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2019-11-23 20:10:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:37,095 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:10:37,095 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:10:37,096 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 20:10:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:10:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 20:10:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:10:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:10:37,104 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 20:10:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:37,105 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:10:37,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:10:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:10:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:10:37,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:37,107 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 20:10:37,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:37,310 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:37,311 INFO L82 PathProgramCache]: Analyzing trace with hash -624080370, now seen corresponding path program 26 times [2019-11-23 20:10:37,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:37,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367660700] [2019-11-23 20:10:37,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:37,719 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 20:10:37,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367660700] [2019-11-23 20:10:37,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196371974] [2019-11-23 20:10:37,720 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 20:10:37,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:37,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:37,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:10:37,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:37,839 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 20:10:37,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:37,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:10:37,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417695321] [2019-11-23 20:10:37,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:10:37,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:37,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:10:37,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:10:37,841 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 30 states. [2019-11-23 20:10:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:37,936 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:10:37,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:10:37,936 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:10:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:37,937 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:10:37,937 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:10:37,939 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 20:10:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:10:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:10:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:10:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:10:37,944 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2019-11-23 20:10:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:37,944 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:10:37,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:10:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:10:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:10:37,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:37,945 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 20:10:38,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:38,149 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1167081420, now seen corresponding path program 27 times [2019-11-23 20:10:38,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:38,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608874592] [2019-11-23 20:10:38,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:38,605 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 20:10:38,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608874592] [2019-11-23 20:10:38,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118265625] [2019-11-23 20:10:38,606 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 20:10:38,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:10:38,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:38,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:10:38,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:39,011 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 20:10:39,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:39,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:10:39,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580724541] [2019-11-23 20:10:39,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:10:39,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:10:39,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:10:39,015 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 39 states. [2019-11-23 20:10:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:39,243 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2019-11-23 20:10:39,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:10:39,244 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 141 [2019-11-23 20:10:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:39,245 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:10:39,245 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:10:39,248 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 20:10:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:10:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2019-11-23 20:10:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:10:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:10:39,254 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 141 [2019-11-23 20:10:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:39,255 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:10:39,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:10:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:10:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:10:39,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:39,257 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 20:10:39,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:39,462 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:39,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:39,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1782074872, now seen corresponding path program 28 times [2019-11-23 20:10:39,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:39,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274904440] [2019-11-23 20:10:39,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:40,197 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 20:10:40,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274904440] [2019-11-23 20:10:40,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898651512] [2019-11-23 20:10:40,198 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 20:10:40,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:40,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:40,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:10:40,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:40,322 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 20:10:40,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:40,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:10:40,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162219425] [2019-11-23 20:10:40,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:10:40,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:10:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:40,325 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 32 states. [2019-11-23 20:10:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:40,432 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:10:40,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:10:40,433 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 20:10:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:40,434 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:10:40,435 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:10:40,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:10:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:10:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:10:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:10:40,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:10:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:40,442 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:10:40,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:10:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:10:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:10:40,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:40,443 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 20:10:40,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:40,648 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 29 times [2019-11-23 20:10:40,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:40,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411452647] [2019-11-23 20:10:40,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:41,248 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 20:10:41,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411452647] [2019-11-23 20:10:41,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864246865] [2019-11-23 20:10:41,248 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 20:10:53,329 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:10:53,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:53,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:10:53,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:53,541 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 20:10:53,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:53,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:10:53,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479791363] [2019-11-23 20:10:53,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:10:53,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:53,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:10:53,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:10:53,543 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 42 states. [2019-11-23 20:10:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:53,920 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:10:53,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:10:53,920 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 147 [2019-11-23 20:10:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:53,922 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:10:53,922 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:10:53,923 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 20:10:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:10:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:10:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:10:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:10:53,930 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:10:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:53,930 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:10:53,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:10:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:10:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:10:53,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:53,932 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 20:10:54,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:54,146 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:54,147 INFO L82 PathProgramCache]: Analyzing trace with hash 300865538, now seen corresponding path program 30 times [2019-11-23 20:10:54,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:54,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217664791] [2019-11-23 20:10:54,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:54,823 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 20:10:54,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217664791] [2019-11-23 20:10:54,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518804162] [2019-11-23 20:10:54,824 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 20:11:00,590 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:11:00,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:00,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:11:00,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:00,831 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 20:11:00,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:00,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:11:00,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376409675] [2019-11-23 20:11:00,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:11:00,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:11:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:11:00,833 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:11:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:01,022 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:11:01,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:11:01,024 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:11:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:01,025 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:11:01,025 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:11:01,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:11:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:11:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:11:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:11:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:11:01,031 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:11:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:01,031 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:11:01,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:11:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:11:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:11:01,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:01,032 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 20:11:01,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:01,239 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1309958206, now seen corresponding path program 31 times [2019-11-23 20:11:01,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:01,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996721573] [2019-11-23 20:11:01,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:01,719 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 20:11:01,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996721573] [2019-11-23 20:11:01,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015075569] [2019-11-23 20:11:01,720 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 20:11:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:01,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:11:01,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:01,864 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 20:11:01,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:01,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:11:01,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879217076] [2019-11-23 20:11:01,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:11:01,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:01,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:11:01,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:11:01,867 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 35 states. [2019-11-23 20:11:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:01,941 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:11:01,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:11:01,941 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 20:11:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:01,942 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:11:01,943 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:11:01,943 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 20:11:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:11:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:11:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:11:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:11:01,948 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:11:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:01,948 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:11:01,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:11:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:11:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:11:01,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:01,949 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 20:11:02,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:02,152 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:02,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172420, now seen corresponding path program 32 times [2019-11-23 20:11:02,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:02,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603904189] [2019-11-23 20:11:02,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:02,923 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 20:11:02,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603904189] [2019-11-23 20:11:02,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445065378] [2019-11-23 20:11:02,925 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 20:11:03,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:03,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:03,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:11:03,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:03,073 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 20:11:03,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:03,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:11:03,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647970964] [2019-11-23 20:11:03,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:11:03,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:03,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:11:03,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:11:03,077 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 36 states. [2019-11-23 20:11:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:03,189 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:11:03,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:11:03,190 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2019-11-23 20:11:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:03,192 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:11:03,192 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:11:03,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:11:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:11:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:11:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:11:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:11:03,197 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:11:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:03,198 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:11:03,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:11:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:11:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:11:03,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:03,199 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 20:11:03,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:03,404 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash 370015802, now seen corresponding path program 33 times [2019-11-23 20:11:03,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:03,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103018062] [2019-11-23 20:11:03,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:04,192 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 20:11:04,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103018062] [2019-11-23 20:11:04,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260676844] [2019-11-23 20:11:04,192 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 20:11:04,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:11:04,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:04,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:11:04,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2019-11-23 20:11:05,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:05,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2019-11-23 20:11:05,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070310935] [2019-11-23 20:11:05,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:11:05,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:05,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:11:05,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:11:05,018 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 20:11:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:05,418 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2019-11-23 20:11:05,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:11:05,418 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 20:11:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:05,419 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:11:05,420 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:11:05,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:11:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:11:05,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 20:11:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:11:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 20:11:05,425 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 20:11:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:05,425 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 20:11:05,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:11:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 20:11:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:11:05,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:05,426 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 20:11:05,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:05,631 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:05,631 INFO L82 PathProgramCache]: Analyzing trace with hash -257617674, now seen corresponding path program 34 times [2019-11-23 20:11:05,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:05,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755246186] [2019-11-23 20:11:05,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:06,200 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 20:11:06,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755246186] [2019-11-23 20:11:06,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653289977] [2019-11-23 20:11:06,200 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 20:11:06,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:06,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:06,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:11:06,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:06,584 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 20:11:06,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:06,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2019-11-23 20:11:06,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352749608] [2019-11-23 20:11:06,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:11:06,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:11:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:11:06,586 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 49 states. [2019-11-23 20:11:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:06,931 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:11:06,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:11:06,932 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2019-11-23 20:11:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:06,933 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:11:06,933 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:11:06,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:11:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:11:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2019-11-23 20:11:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:11:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 20:11:06,940 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2019-11-23 20:11:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:06,940 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 20:11:06,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:11:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 20:11:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:11:06,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:06,941 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 20:11:07,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:07,145 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:07,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1138775886, now seen corresponding path program 35 times [2019-11-23 20:11:07,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:07,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923883167] [2019-11-23 20:11:07,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:08,059 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 20:11:08,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923883167] [2019-11-23 20:11:08,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17796987] [2019-11-23 20:11:08,060 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 20:11:23,388 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:11:23,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:23,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:11:23,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:23,701 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 20:11:23,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:23,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 15] total 51 [2019-11-23 20:11:23,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209289391] [2019-11-23 20:11:23,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:11:23,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:11:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:11:23,704 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 51 states. [2019-11-23 20:11:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:24,099 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2019-11-23 20:11:24,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:11:24,100 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 179 [2019-11-23 20:11:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:24,101 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:11:24,101 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:11:24,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:11:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:11:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-11-23 20:11:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:11:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:11:24,107 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2019-11-23 20:11:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:24,107 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:11:24,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:11:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:11:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:11:24,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:24,108 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 20:11:24,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:24,318 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash -556563090, now seen corresponding path program 36 times [2019-11-23 20:11:24,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:24,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141078451] [2019-11-23 20:11:24,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:24,994 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 20:11:24,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141078451] [2019-11-23 20:11:24,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140072296] [2019-11-23 20:11:24,995 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 20:11:28,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:11:28,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:28,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:11:28,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:29,031 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 20:11:29,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:29,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 20:11:29,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547201767] [2019-11-23 20:11:29,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:11:29,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:29,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:11:29,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:11:29,033 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 50 states. [2019-11-23 20:11:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:29,301 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2019-11-23 20:11:29,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:11:29,302 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 187 [2019-11-23 20:11:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:29,303 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:11:29,303 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 20:11:29,304 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 20:11:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 20:11:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2019-11-23 20:11:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:11:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 20:11:29,311 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 187 [2019-11-23 20:11:29,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:29,311 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 20:11:29,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:11:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 20:11:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:11:29,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:29,314 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 20:11:29,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:29,520 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:29,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1061272234, now seen corresponding path program 37 times [2019-11-23 20:11:29,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:29,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394030748] [2019-11-23 20:11:29,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:30,270 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 20:11:30,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394030748] [2019-11-23 20:11:30,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311152448] [2019-11-23 20:11:30,271 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 20:11:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:30,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:11:30,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:30,408 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 20:11:30,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:30,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:11:30,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253038177] [2019-11-23 20:11:30,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:11:30,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:11:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:11:30,411 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 41 states. [2019-11-23 20:11:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:30,549 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2019-11-23 20:11:30,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:11:30,550 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2019-11-23 20:11:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:30,551 INFO L225 Difference]: With dead ends: 310 [2019-11-23 20:11:30,551 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:11:30,552 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 20:11:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:11:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 20:11:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:11:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:11:30,563 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2019-11-23 20:11:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:30,563 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:11:30,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:11:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:11:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:11:30,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:30,564 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 20:11:30,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:30,768 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash 712240488, now seen corresponding path program 38 times [2019-11-23 20:11:30,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:30,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119940304] [2019-11-23 20:11:30,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:31,574 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 20:11:31,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119940304] [2019-11-23 20:11:31,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929112998] [2019-11-23 20:11:31,574 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 20:11:31,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:31,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:31,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:11:31,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:31,716 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 20:11:31,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:31,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:11:31,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288173845] [2019-11-23 20:11:31,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:11:31,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:11:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:11:31,718 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 42 states. [2019-11-23 20:11:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:31,917 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2019-11-23 20:11:31,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:11:31,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 193 [2019-11-23 20:11:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:31,920 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:11:31,920 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 20:11:31,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:11:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 20:11:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 20:11:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:11:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 20:11:31,927 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2019-11-23 20:11:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:31,928 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 20:11:31,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:11:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 20:11:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 20:11:31,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:31,930 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 20:11:32,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:32,136 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash 300181670, now seen corresponding path program 39 times [2019-11-23 20:11:32,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:32,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820829692] [2019-11-23 20:11:32,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:32,827 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 20:11:32,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820829692] [2019-11-23 20:11:32,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296571581] [2019-11-23 20:11:32,828 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 20:11:33,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:11:33,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:33,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:11:33,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:33,738 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 20:11:33,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:33,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2019-11-23 20:11:33,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590647962] [2019-11-23 20:11:33,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:11:33,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:11:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:11:33,740 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 54 states. [2019-11-23 20:11:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:34,023 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-11-23 20:11:34,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:11:34,024 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 195 [2019-11-23 20:11:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:34,025 INFO L225 Difference]: With dead ends: 317 [2019-11-23 20:11:34,025 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:11:34,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:11:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:11:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 20:11:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 20:11:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 20:11:34,029 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 20:11:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:34,030 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 20:11:34,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:11:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 20:11:34,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 20:11:34,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:34,031 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 20:11:34,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:34,236 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1362128414, now seen corresponding path program 40 times [2019-11-23 20:11:34,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:34,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391259512] [2019-11-23 20:11:34,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:34,989 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 20:11:34,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391259512] [2019-11-23 20:11:34,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176293772] [2019-11-23 20:11:34,990 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 20:11:35,094 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:35,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:35,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:11:35,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:35,398 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 20:11:35,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:35,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 15] total 56 [2019-11-23 20:11:35,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893167232] [2019-11-23 20:11:35,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:11:35,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:11:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:11:35,400 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 56 states. [2019-11-23 20:11:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:35,682 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2019-11-23 20:11:35,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:11:35,682 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 199 [2019-11-23 20:11:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:35,683 INFO L225 Difference]: With dead ends: 323 [2019-11-23 20:11:35,683 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:11:35,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1007, Invalid=2073, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:11:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:11:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2019-11-23 20:11:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:11:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2019-11-23 20:11:35,688 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 199 [2019-11-23 20:11:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:35,689 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2019-11-23 20:11:35,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:11:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2019-11-23 20:11:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 20:11:35,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:35,690 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 20:11:35,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:35,895 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2033644258, now seen corresponding path program 41 times [2019-11-23 20:11:35,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:35,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955483484] [2019-11-23 20:11:35,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:36,764 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 20:11:36,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955483484] [2019-11-23 20:11:36,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248059910] [2019-11-23 20:11:36,765 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