/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/seq-pthread/cs_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:46:45,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:46:45,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:46:45,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:46:45,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:46:45,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:46:45,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:46:45,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:46:45,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:46:45,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:46:45,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:46:45,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:46:45,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:46:45,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:46:45,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:46:45,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:46:45,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:46:45,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:46:45,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:46:45,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:46:45,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:46:45,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:46:45,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:46:45,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:46:45,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:46:45,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:46:45,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:46:45,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:46:45,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:46:45,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:46:45,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:46:45,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:46:45,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:46:45,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:46:45,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:46:45,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:46:45,917 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 22:46:45,936 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:46:45,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:46:45,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:46:45,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:46:45,939 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:46:45,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:46:45,939 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:46:45,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:46:45,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:46:45,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:46:45,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:46:45,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:46:45,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:46:45,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:46:45,942 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:46:45,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:46:45,942 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:46:45,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:46:45,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:46:45,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:46:45,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:46:45,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:46:45,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:46:45,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:46:45,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:46:45,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:46:45,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:46:45,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:46:45,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:46:45,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:46:46,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:46:46,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:46:46,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:46:46,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:46:46,232 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:46:46,233 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-11-23 22:46:46,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba53b912c/9398d0756b244d8f8615e645f7e9385c/FLAGa3fb29173 [2019-11-23 22:46:46,850 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:46:46,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-11-23 22:46:46,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba53b912c/9398d0756b244d8f8615e645f7e9385c/FLAGa3fb29173 [2019-11-23 22:46:47,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba53b912c/9398d0756b244d8f8615e645f7e9385c [2019-11-23 22:46:47,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:46:47,137 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:46:47,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:46:47,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:46:47,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:46:47,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:46:47" (1/1) ... [2019-11-23 22:46:47,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ac6e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:47, skipping insertion in model container [2019-11-23 22:46:47,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:46:47" (1/1) ... [2019-11-23 22:46:47,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:46:47,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:46:47,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:46:47,846 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:46:47,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:46:48,053 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:46:48,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48 WrapperNode [2019-11-23 22:46:48,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:46:48,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:46:48,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:46:48,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:46:48,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:46:48,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:46:48,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:46:48,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:46:48,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (1/1) ... [2019-11-23 22:46:48,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:46:48,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:46:48,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:46:48,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:46:48,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (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 22:46:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:46:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:46:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-23 22:46:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:46:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-23 22:46:48,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:46:48,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-23 22:46:48,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:46:48,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:46:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:46:51,933 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:46:51,934 INFO L284 CfgBuilder]: Removed 74 assume(true) statements. [2019-11-23 22:46:51,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:46:51 BoogieIcfgContainer [2019-11-23 22:46:51,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:46:51,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:46:51,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:46:51,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:46:51,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:46:47" (1/3) ... [2019-11-23 22:46:51,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6324054a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:46:51, skipping insertion in model container [2019-11-23 22:46:51,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:46:48" (2/3) ... [2019-11-23 22:46:51,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6324054a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:46:51, skipping insertion in model container [2019-11-23 22:46:51,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:46:51" (3/3) ... [2019-11-23 22:46:51,948 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_szymanski.i [2019-11-23 22:46:51,958 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:46:51,968 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:46:51,980 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:46:52,016 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:46:52,017 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:46:52,017 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:46:52,018 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:46:52,018 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:46:52,018 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:46:52,018 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:46:52,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:46:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states. [2019-11-23 22:46:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:46:52,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:52,056 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:52,057 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1639723903, now seen corresponding path program 1 times [2019-11-23 22:46:52,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:52,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490268440] [2019-11-23 22:46:52,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:52,360 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 22:46:52,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490268440] [2019-11-23 22:46:52,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:52,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:52,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873998700] [2019-11-23 22:46:52,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:52,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:52,386 INFO L87 Difference]: Start difference. First operand 116 states. Second operand 3 states. [2019-11-23 22:46:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:52,468 INFO L93 Difference]: Finished difference Result 234 states and 378 transitions. [2019-11-23 22:46:52,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:52,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 22:46:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:52,494 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:46:52,495 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 22:46:52,505 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 22:46:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 22:46:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2019-11-23 22:46:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 22:46:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2019-11-23 22:46:52,564 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 12 [2019-11-23 22:46:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:52,564 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2019-11-23 22:46:52,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2019-11-23 22:46:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:46:52,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:52,566 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:52,566 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:52,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1335455317, now seen corresponding path program 1 times [2019-11-23 22:46:52,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:52,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759016269] [2019-11-23 22:46:52,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:52,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759016269] [2019-11-23 22:46:52,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:52,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:52,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116413992] [2019-11-23 22:46:52,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:52,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:52,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:46:52,665 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand 3 states. [2019-11-23 22:46:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:52,703 INFO L93 Difference]: Finished difference Result 225 states and 360 transitions. [2019-11-23 22:46:52,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:52,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 22:46:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:52,706 INFO L225 Difference]: With dead ends: 225 [2019-11-23 22:46:52,706 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:46:52,708 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 22:46:52,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:46:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 22:46:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:46:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 181 transitions. [2019-11-23 22:46:52,718 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 181 transitions. Word has length 15 [2019-11-23 22:46:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:52,718 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 181 transitions. [2019-11-23 22:46:52,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 181 transitions. [2019-11-23 22:46:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:46:52,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:52,719 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 22:46:52,720 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:52,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1209488173, now seen corresponding path program 1 times [2019-11-23 22:46:52,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:52,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855363553] [2019-11-23 22:46:52,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:46:52,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855363553] [2019-11-23 22:46:52,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703414928] [2019-11-23 22:46:52,967 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 22:46:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:53,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:46:53,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:46:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:46:53,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:46:53,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 22:46:53,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760158856] [2019-11-23 22:46:53,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:46:53,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:46:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:46:53,215 INFO L87 Difference]: Start difference. First operand 114 states and 181 transitions. Second operand 6 states. [2019-11-23 22:46:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:53,357 INFO L93 Difference]: Finished difference Result 243 states and 383 transitions. [2019-11-23 22:46:53,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:46:53,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 22:46:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:53,362 INFO L225 Difference]: With dead ends: 243 [2019-11-23 22:46:53,362 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 22:46:53,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:46:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 22:46:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 123. [2019-11-23 22:46:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-23 22:46:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 191 transitions. [2019-11-23 22:46:53,384 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 191 transitions. Word has length 17 [2019-11-23 22:46:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:53,385 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 191 transitions. [2019-11-23 22:46:53,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:46:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 191 transitions. [2019-11-23 22:46:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:46:53,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:53,387 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:53,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:53,598 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1564609919, now seen corresponding path program 2 times [2019-11-23 22:46:53,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:53,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090937720] [2019-11-23 22:46:53,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:46:53,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090937720] [2019-11-23 22:46:53,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971062819] [2019-11-23 22:46:53,761 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 22:46:53,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:46:53,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:46:53,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:46:53,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:46:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:46:54,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:46:54,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-23 22:46:54,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40974501] [2019-11-23 22:46:54,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:46:54,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:54,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:46:54,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:46:54,027 INFO L87 Difference]: Start difference. First operand 123 states and 191 transitions. Second operand 3 states. [2019-11-23 22:46:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:54,040 INFO L93 Difference]: Finished difference Result 195 states and 306 transitions. [2019-11-23 22:46:54,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:46:54,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2019-11-23 22:46:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:54,042 INFO L225 Difference]: With dead ends: 195 [2019-11-23 22:46:54,042 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:46:54,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:46:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:46:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2019-11-23 22:46:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-23 22:46:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 190 transitions. [2019-11-23 22:46:54,052 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 190 transitions. Word has length 26 [2019-11-23 22:46:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:54,052 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 190 transitions. [2019-11-23 22:46:54,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:46:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 190 transitions. [2019-11-23 22:46:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:46:54,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:54,054 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:54,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:54,260 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1397266637, now seen corresponding path program 1 times [2019-11-23 22:46:54,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:54,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767141323] [2019-11-23 22:46:54,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:46:54,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767141323] [2019-11-23 22:46:54,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745252200] [2019-11-23 22:46:54,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:54,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:46:54,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:46:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:46:54,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:46:54,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-23 22:46:54,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414954050] [2019-11-23 22:46:54,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:46:54,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:46:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:46:54,667 INFO L87 Difference]: Start difference. First operand 123 states and 190 transitions. Second operand 8 states. [2019-11-23 22:46:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:54,864 INFO L93 Difference]: Finished difference Result 251 states and 389 transitions. [2019-11-23 22:46:54,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:46:54,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-11-23 22:46:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:54,866 INFO L225 Difference]: With dead ends: 251 [2019-11-23 22:46:54,866 INFO L226 Difference]: Without dead ends: 136 [2019-11-23 22:46:54,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:46:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-23 22:46:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2019-11-23 22:46:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:46:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 204 transitions. [2019-11-23 22:46:54,876 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 204 transitions. Word has length 32 [2019-11-23 22:46:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:54,876 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 204 transitions. [2019-11-23 22:46:54,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:46:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 204 transitions. [2019-11-23 22:46:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:46:54,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:54,878 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:55,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:46:55,084 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:55,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1464928831, now seen corresponding path program 2 times [2019-11-23 22:46:55,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:55,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182065562] [2019-11-23 22:46:55,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:46:58,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182065562] [2019-11-23 22:46:58,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:58,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:46:58,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951456952] [2019-11-23 22:46:58,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:46:58,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:46:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:46:58,043 INFO L87 Difference]: Start difference. First operand 136 states and 204 transitions. Second operand 4 states. [2019-11-23 22:46:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:58,108 INFO L93 Difference]: Finished difference Result 223 states and 343 transitions. [2019-11-23 22:46:58,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:46:58,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-11-23 22:46:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:46:58,110 INFO L225 Difference]: With dead ends: 223 [2019-11-23 22:46:58,111 INFO L226 Difference]: Without dead ends: 212 [2019-11-23 22:46:58,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:46:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-11-23 22:46:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-11-23 22:46:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-23 22:46:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 323 transitions. [2019-11-23 22:46:58,161 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 323 transitions. Word has length 45 [2019-11-23 22:46:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:46:58,162 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 323 transitions. [2019-11-23 22:46:58,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:46:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 323 transitions. [2019-11-23 22:46:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:46:58,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:46:58,164 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:46:58,165 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:46:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:46:58,165 INFO L82 PathProgramCache]: Analyzing trace with hash -531939765, now seen corresponding path program 1 times [2019-11-23 22:46:58,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:46:58,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414287329] [2019-11-23 22:46:58,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:46:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:46:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:46:59,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414287329] [2019-11-23 22:46:59,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:46:59,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:46:59,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314819568] [2019-11-23 22:46:59,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:46:59,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:46:59,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:46:59,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:46:59,758 INFO L87 Difference]: Start difference. First operand 212 states and 323 transitions. Second operand 4 states. [2019-11-23 22:46:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:46:59,999 INFO L93 Difference]: Finished difference Result 434 states and 670 transitions. [2019-11-23 22:46:59,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:47:00,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-11-23 22:47:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:00,002 INFO L225 Difference]: With dead ends: 434 [2019-11-23 22:47:00,002 INFO L226 Difference]: Without dead ends: 258 [2019-11-23 22:47:00,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:47:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-23 22:47:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2019-11-23 22:47:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2019-11-23 22:47:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 382 transitions. [2019-11-23 22:47:00,013 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 382 transitions. Word has length 60 [2019-11-23 22:47:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:00,013 INFO L462 AbstractCegarLoop]: Abstraction has 258 states and 382 transitions. [2019-11-23 22:47:00,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:47:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 382 transitions. [2019-11-23 22:47:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:47:00,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:00,016 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:00,017 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:00,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1349588215, now seen corresponding path program 1 times [2019-11-23 22:47:00,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:00,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239819822] [2019-11-23 22:47:00,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:03,312 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2019-11-23 22:47:03,574 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-11-23 22:47:03,811 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-11-23 22:47:04,106 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-11-23 22:47:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:04,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239819822] [2019-11-23 22:47:04,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:04,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-23 22:47:04,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890236349] [2019-11-23 22:47:04,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:47:04,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:47:04,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:47:04,287 INFO L87 Difference]: Start difference. First operand 258 states and 382 transitions. Second operand 13 states. [2019-11-23 22:47:06,817 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2019-11-23 22:47:07,022 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-11-23 22:47:07,298 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-11-23 22:47:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:10,099 INFO L93 Difference]: Finished difference Result 540 states and 819 transitions. [2019-11-23 22:47:10,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:47:10,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2019-11-23 22:47:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:10,103 INFO L225 Difference]: With dead ends: 540 [2019-11-23 22:47:10,103 INFO L226 Difference]: Without dead ends: 453 [2019-11-23 22:47:10,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:47:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-11-23 22:47:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 297. [2019-11-23 22:47:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2019-11-23 22:47:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 433 transitions. [2019-11-23 22:47:10,119 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 433 transitions. Word has length 60 [2019-11-23 22:47:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:10,120 INFO L462 AbstractCegarLoop]: Abstraction has 297 states and 433 transitions. [2019-11-23 22:47:10,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:47:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 433 transitions. [2019-11-23 22:47:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:47:10,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:10,122 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:10,122 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:10,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1859061305, now seen corresponding path program 1 times [2019-11-23 22:47:10,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:10,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841259722] [2019-11-23 22:47:10,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:10,847 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2019-11-23 22:47:11,041 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-11-23 22:47:11,264 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2019-11-23 22:47:11,469 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2019-11-23 22:47:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:11,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841259722] [2019-11-23 22:47:11,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:11,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-23 22:47:11,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360216261] [2019-11-23 22:47:11,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:47:11,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:11,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:47:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:47:11,556 INFO L87 Difference]: Start difference. First operand 297 states and 433 transitions. Second operand 11 states. [2019-11-23 22:47:14,077 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2019-11-23 22:47:14,402 WARN L192 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-11-23 22:47:14,801 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2019-11-23 22:47:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:17,116 INFO L93 Difference]: Finished difference Result 588 states and 881 transitions. [2019-11-23 22:47:17,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:47:17,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2019-11-23 22:47:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:17,121 INFO L225 Difference]: With dead ends: 588 [2019-11-23 22:47:17,121 INFO L226 Difference]: Without dead ends: 501 [2019-11-23 22:47:17,125 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:47:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2019-11-23 22:47:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 297. [2019-11-23 22:47:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2019-11-23 22:47:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 433 transitions. [2019-11-23 22:47:17,156 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 433 transitions. Word has length 60 [2019-11-23 22:47:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:17,156 INFO L462 AbstractCegarLoop]: Abstraction has 297 states and 433 transitions. [2019-11-23 22:47:17,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:47:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 433 transitions. [2019-11-23 22:47:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:47:17,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:17,158 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:17,158 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash 630467657, now seen corresponding path program 1 times [2019-11-23 22:47:17,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:17,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894092710] [2019-11-23 22:47:17,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:20,799 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-23 22:47:21,095 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2019-11-23 22:47:21,396 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 83 [2019-11-23 22:47:21,782 WARN L192 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2019-11-23 22:47:22,257 WARN L192 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 104 [2019-11-23 22:47:22,993 WARN L192 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 114 [2019-11-23 22:47:23,772 WARN L192 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 122 [2019-11-23 22:47:24,091 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 74 [2019-11-23 22:47:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:24,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894092710] [2019-11-23 22:47:24,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:24,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-23 22:47:24,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236494163] [2019-11-23 22:47:24,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:47:24,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:24,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:47:24,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:47:24,467 INFO L87 Difference]: Start difference. First operand 297 states and 433 transitions. Second operand 12 states. [2019-11-23 22:47:24,749 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2019-11-23 22:47:41,095 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2019-11-23 22:47:41,704 WARN L192 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 88 [2019-11-23 22:47:42,347 WARN L192 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 90 [2019-11-23 22:47:43,231 WARN L192 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 113 [2019-11-23 22:47:44,167 WARN L192 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 115 [2019-11-23 22:47:44,519 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2019-11-23 22:47:44,968 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2019-11-23 22:47:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:46,810 INFO L93 Difference]: Finished difference Result 463 states and 687 transitions. [2019-11-23 22:47:46,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:47:46,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2019-11-23 22:47:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:46,815 INFO L225 Difference]: With dead ends: 463 [2019-11-23 22:47:46,815 INFO L226 Difference]: Without dead ends: 376 [2019-11-23 22:47:46,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:47:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2019-11-23 22:47:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 284. [2019-11-23 22:47:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2019-11-23 22:47:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 414 transitions. [2019-11-23 22:47:46,835 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 414 transitions. Word has length 60 [2019-11-23 22:47:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:46,835 INFO L462 AbstractCegarLoop]: Abstraction has 284 states and 414 transitions. [2019-11-23 22:47:46,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:47:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 414 transitions. [2019-11-23 22:47:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:47:46,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:46,837 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:46,837 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash 492498212, now seen corresponding path program 1 times [2019-11-23 22:47:46,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:46,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47907555] [2019-11-23 22:47:46,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:46,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47907555] [2019-11-23 22:47:46,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:46,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:47:46,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450202283] [2019-11-23 22:47:46,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:47:46,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:46,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:47:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:47:46,928 INFO L87 Difference]: Start difference. First operand 284 states and 414 transitions. Second operand 3 states. [2019-11-23 22:47:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:47,011 INFO L93 Difference]: Finished difference Result 459 states and 695 transitions. [2019-11-23 22:47:47,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:47:47,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-11-23 22:47:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:47,014 INFO L225 Difference]: With dead ends: 459 [2019-11-23 22:47:47,014 INFO L226 Difference]: Without dead ends: 294 [2019-11-23 22:47:47,014 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 22:47:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-23 22:47:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-23 22:47:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-23 22:47:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 423 transitions. [2019-11-23 22:47:47,041 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 423 transitions. Word has length 63 [2019-11-23 22:47:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:47,041 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 423 transitions. [2019-11-23 22:47:47,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:47:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 423 transitions. [2019-11-23 22:47:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:47:47,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:47,043 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:47,043 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1095849690, now seen corresponding path program 1 times [2019-11-23 22:47:47,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:47,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605933319] [2019-11-23 22:47:47,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:50,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605933319] [2019-11-23 22:47:50,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:50,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:47:50,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773262936] [2019-11-23 22:47:50,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:47:50,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:47:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:47:50,496 INFO L87 Difference]: Start difference. First operand 294 states and 423 transitions. Second operand 5 states. [2019-11-23 22:47:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:47:51,158 INFO L93 Difference]: Finished difference Result 646 states and 929 transitions. [2019-11-23 22:47:51,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:47:51,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-23 22:47:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:47:51,161 INFO L225 Difference]: With dead ends: 646 [2019-11-23 22:47:51,161 INFO L226 Difference]: Without dead ends: 404 [2019-11-23 22:47:51,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:47:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-11-23 22:47:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 318. [2019-11-23 22:47:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2019-11-23 22:47:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 433 transitions. [2019-11-23 22:47:51,182 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 433 transitions. Word has length 63 [2019-11-23 22:47:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:47:51,183 INFO L462 AbstractCegarLoop]: Abstraction has 318 states and 433 transitions. [2019-11-23 22:47:51,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:47:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 433 transitions. [2019-11-23 22:47:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:47:51,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:47:51,184 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:47:51,184 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:47:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:47:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash 90491624, now seen corresponding path program 1 times [2019-11-23 22:47:51,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:47:51,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914251411] [2019-11-23 22:47:51,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:47:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:47:56,339 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2019-11-23 22:47:56,485 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2019-11-23 22:47:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:47:56,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914251411] [2019-11-23 22:47:56,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:47:56,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-23 22:47:56,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374296285] [2019-11-23 22:47:56,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:47:56,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:47:56,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:47:56,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:47:56,645 INFO L87 Difference]: Start difference. First operand 318 states and 433 transitions. Second operand 11 states.