/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:05:40,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:05:40,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:05:40,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:05:40,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:05:40,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:05:40,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:05:40,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:05:40,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:05:40,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:05:40,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:05:40,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:05:40,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:05:40,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:05:40,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:05:40,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:05:40,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:05:40,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:05:40,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:05:40,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:05:40,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:05:40,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:05:40,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:05:40,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:05:40,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:05:40,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:05:40,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:05:40,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:05:40,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:05:40,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:05:40,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:05:40,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:05:40,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:05:40,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:05:40,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:05:40,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:05:40,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:05:40,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:05:40,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:05:40,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:05:40,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:05:40,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:05:40,233 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:05:40,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:05:40,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:05:40,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:05:40,235 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:05:40,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:05:40,235 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:05:40,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:05:40,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:05:40,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:05:40,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:05:40,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:05:40,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:05:40,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:05:40,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:05:40,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:05:40,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:05:40,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:05:40,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:05:40,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:05:40,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:05:40,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:05:40,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:05:40,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:05:40,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:05:40,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:05:40,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:05:40,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:05:40,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:05:40,241 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:05:40,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:05:40,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:05:40,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:05:40,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:05:40,595 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:05:40,596 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:05:40,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a90c38f93/4cfd0816067041488e7993f81ff66522/FLAGa884ff87c [2020-10-12 20:05:41,161 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:05:41,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:05:41,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a90c38f93/4cfd0816067041488e7993f81ff66522/FLAGa884ff87c [2020-10-12 20:05:41,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a90c38f93/4cfd0816067041488e7993f81ff66522 [2020-10-12 20:05:41,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:05:41,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:05:41,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:05:41,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:05:41,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:05:41,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:05:41" (1/1) ... [2020-10-12 20:05:41,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a8a6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:41, skipping insertion in model container [2020-10-12 20:05:41,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:05:41" (1/1) ... [2020-10-12 20:05:41,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:05:41,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:05:41,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:05:41,907 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:05:41,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:05:42,017 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:05:42,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42 WrapperNode [2020-10-12 20:05:42,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:05:42,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:05:42,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:05:42,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:05:42,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... [2020-10-12 20:05:42,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... [2020-10-12 20:05:42,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... [2020-10-12 20:05:42,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... [2020-10-12 20:05:42,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... [2020-10-12 20:05:42,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... [2020-10-12 20:05:42,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... [2020-10-12 20:05:42,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:05:42,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:05:42,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:05:42,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:05:42,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 20:05:42,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:05:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:05:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:05:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:05:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:05:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:05:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:05:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:05:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:05:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:05:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:05:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:05:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:05:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:05:42,153 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:05:42,153 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:05:42,153 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:05:42,153 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 20:05:42,153 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:05:42,153 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:05:42,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:05:42,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:05:42,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:05:42,878 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:05:42,878 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:05:42,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:05:42 BoogieIcfgContainer [2020-10-12 20:05:42,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:05:42,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:05:42,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:05:42,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:05:42,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:05:41" (1/3) ... [2020-10-12 20:05:42,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b14cff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:05:42, skipping insertion in model container [2020-10-12 20:05:42,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:05:42" (2/3) ... [2020-10-12 20:05:42,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b14cff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:05:42, skipping insertion in model container [2020-10-12 20:05:42,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:05:42" (3/3) ... [2020-10-12 20:05:42,893 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:05:42,903 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:05:42,911 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:05:42,925 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:05:42,952 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:05:42,952 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:05:42,952 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:05:42,953 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:05:42,953 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:05:42,953 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:05:42,953 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:05:42,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:05:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-10-12 20:05:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 20:05:42,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:42,990 INFO L422 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, 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, 1, 1] [2020-10-12 20:05:42,990 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:42,996 INFO L82 PathProgramCache]: Analyzing trace with hash 153946672, now seen corresponding path program 1 times [2020-10-12 20:05:43,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:43,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770128754] [2020-10-12 20:05:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:43,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:43,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:43,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:43,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:44,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:47,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:47,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 20:05:47,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:05:47,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4198 [2020-10-12 20:05:47,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:05:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:05:47,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 20:05:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:05:47,937 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:05:47,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:47,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:47,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:47,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:47,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:47,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 20:05:47,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:47,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:47,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:47,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:05:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:48,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770128754] [2020-10-12 20:05:48,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:05:48,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:05:48,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645045552] [2020-10-12 20:05:48,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:05:48,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:05:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:05:48,090 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 8 states. [2020-10-12 20:05:48,412 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-12 20:05:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:49,363 INFO L93 Difference]: Finished difference Result 767 states and 1213 transitions. [2020-10-12 20:05:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:05:49,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 20:05:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:49,385 INFO L225 Difference]: With dead ends: 767 [2020-10-12 20:05:49,385 INFO L226 Difference]: Without dead ends: 639 [2020-10-12 20:05:49,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-12 20:05:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2020-10-12 20:05:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 237. [2020-10-12 20:05:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 20:05:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 354 transitions. [2020-10-12 20:05:49,462 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 354 transitions. Word has length 65 [2020-10-12 20:05:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:49,463 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 354 transitions. [2020-10-12 20:05:49,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:05:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 354 transitions. [2020-10-12 20:05:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:05:49,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:49,466 INFO L422 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, 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, 1, 1, 1] [2020-10-12 20:05:49,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:05:49,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash 458846826, now seen corresponding path program 1 times [2020-10-12 20:05:49,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:49,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494868477] [2020-10-12 20:05:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:49,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:49,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:49,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:51,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:51,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:05:51,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:05:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2330 [2020-10-12 20:05:51,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:51,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:05:51,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-12 20:05:51,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:05:51,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:52,109 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:05:52,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:52,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:52,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:52,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:52,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:52,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 20:05:52,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:05:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:52,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494868477] [2020-10-12 20:05:52,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:05:52,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:05:52,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459411381] [2020-10-12 20:05:52,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:05:52,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:52,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:05:52,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:05:52,158 INFO L87 Difference]: Start difference. First operand 237 states and 354 transitions. Second operand 5 states. [2020-10-12 20:05:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:53,120 INFO L93 Difference]: Finished difference Result 439 states and 673 transitions. [2020-10-12 20:05:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:05:53,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 20:05:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:53,125 INFO L225 Difference]: With dead ends: 439 [2020-10-12 20:05:53,125 INFO L226 Difference]: Without dead ends: 437 [2020-10-12 20:05:53,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:05:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-12 20:05:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 241. [2020-10-12 20:05:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-12 20:05:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 358 transitions. [2020-10-12 20:05:53,151 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 358 transitions. Word has length 66 [2020-10-12 20:05:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:53,152 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 358 transitions. [2020-10-12 20:05:53,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:05:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 358 transitions. [2020-10-12 20:05:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:05:53,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:53,155 INFO L422 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, 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, 1, 1, 1, 1] [2020-10-12 20:05:53,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:05:53,155 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:53,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1348969503, now seen corresponding path program 1 times [2020-10-12 20:05:53,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:53,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016046985] [2020-10-12 20:05:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:53,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:53,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:53,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:54,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:54,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:05:54,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:05:54,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1527 [2020-10-12 20:05:54,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:54,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:05:54,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 20:05:54,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:05:54,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:05:54,968 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:05:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:54,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:54,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:54,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:54,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 20:05:54,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:55,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:05:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:55,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016046985] [2020-10-12 20:05:55,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:05:55,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:05:55,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381434020] [2020-10-12 20:05:55,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:05:55,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:05:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:05:55,026 INFO L87 Difference]: Start difference. First operand 241 states and 358 transitions. Second operand 4 states. [2020-10-12 20:05:55,276 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:05:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:56,074 INFO L93 Difference]: Finished difference Result 613 states and 944 transitions. [2020-10-12 20:05:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:05:56,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-12 20:05:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:56,078 INFO L225 Difference]: With dead ends: 613 [2020-10-12 20:05:56,078 INFO L226 Difference]: Without dead ends: 411 [2020-10-12 20:05:56,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:05:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-12 20:05:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2020-10-12 20:05:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-12 20:05:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 622 transitions. [2020-10-12 20:05:56,110 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 622 transitions. Word has length 67 [2020-10-12 20:05:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:56,111 INFO L479 AbstractCegarLoop]: Abstraction has 409 states and 622 transitions. [2020-10-12 20:05:56,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:05:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 622 transitions. [2020-10-12 20:05:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:05:56,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:56,113 INFO L422 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, 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, 1, 1, 1, 1, 1] [2020-10-12 20:05:56,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:05:56,114 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:56,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:56,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1627984287, now seen corresponding path program 1 times [2020-10-12 20:05:56,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:56,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145399950] [2020-10-12 20:05:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:56,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:56,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:56,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:56,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:56,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:05:56,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:05:56,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-12 20:05:56,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:56,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:05:56,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 20:05:56,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:05:56,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:57,128 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:05:57,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:57,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:57,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:57,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:57,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:57,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 20:05:57,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:57,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:57,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:05:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:57,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145399950] [2020-10-12 20:05:57,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:05:57,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:05:57,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435840073] [2020-10-12 20:05:57,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:05:57,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:57,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:05:57,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:05:57,195 INFO L87 Difference]: Start difference. First operand 409 states and 622 transitions. Second operand 4 states. [2020-10-12 20:05:57,427 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:05:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:58,141 INFO L93 Difference]: Finished difference Result 1085 states and 1684 transitions. [2020-10-12 20:05:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:05:58,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-12 20:05:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:58,146 INFO L225 Difference]: With dead ends: 1085 [2020-10-12 20:05:58,147 INFO L226 Difference]: Without dead ends: 715 [2020-10-12 20:05:58,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:05:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-12 20:05:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 713. [2020-10-12 20:05:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-12 20:05:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1096 transitions. [2020-10-12 20:05:58,193 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1096 transitions. Word has length 68 [2020-10-12 20:05:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:58,194 INFO L479 AbstractCegarLoop]: Abstraction has 713 states and 1096 transitions. [2020-10-12 20:05:58,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:05:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1096 transitions. [2020-10-12 20:05:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:05:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:58,195 INFO L422 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:05:58,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:05:58,196 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1805377676, now seen corresponding path program 1 times [2020-10-12 20:05:58,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:58,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568253866] [2020-10-12 20:05:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:58,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:58,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:58,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:58,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:05:58,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:05:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-12 20:05:58,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:05:58,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 20:05:58,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:05:58,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:58,705 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:05:58,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:58,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:58,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:58,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:58,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:58,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:05:58,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:58,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:58,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:58,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:58,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:58,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568253866] [2020-10-12 20:05:58,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:05:58,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:05:58,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455439857] [2020-10-12 20:05:58,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:05:58,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:05:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:05:58,740 INFO L87 Difference]: Start difference. First operand 713 states and 1096 transitions. Second operand 4 states. [2020-10-12 20:05:58,906 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:05:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:59,559 INFO L93 Difference]: Finished difference Result 1933 states and 3002 transitions. [2020-10-12 20:05:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:05:59,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-12 20:05:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:59,569 INFO L225 Difference]: With dead ends: 1933 [2020-10-12 20:05:59,569 INFO L226 Difference]: Without dead ends: 1259 [2020-10-12 20:05:59,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:05:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2020-10-12 20:05:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1257. [2020-10-12 20:05:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1257 states. [2020-10-12 20:05:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1936 transitions. [2020-10-12 20:05:59,657 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1936 transitions. Word has length 69 [2020-10-12 20:05:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:59,659 INFO L479 AbstractCegarLoop]: Abstraction has 1257 states and 1936 transitions. [2020-10-12 20:05:59,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:05:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1936 transitions. [2020-10-12 20:05:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:05:59,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:59,661 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:05:59,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:05:59,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1001369689, now seen corresponding path program 1 times [2020-10-12 20:05:59,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:59,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084098220] [2020-10-12 20:05:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:59,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:59,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:59,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:59,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:05:59,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:05:59,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-12 20:05:59,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:59,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:05:59,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:05:59,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 20:05:59,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:00,053 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:00,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:00,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:00,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:00,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:00,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 20:06:00,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:00,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:00,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:00,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:00,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084098220] [2020-10-12 20:06:00,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:06:00,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:06:00,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418067039] [2020-10-12 20:06:00,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:06:00,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:06:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:06:00,098 INFO L87 Difference]: Start difference. First operand 1257 states and 1936 transitions. Second operand 4 states. [2020-10-12 20:06:00,273 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:06:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:00,931 INFO L93 Difference]: Finished difference Result 3581 states and 5538 transitions. [2020-10-12 20:06:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:06:00,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-12 20:06:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:00,944 INFO L225 Difference]: With dead ends: 3581 [2020-10-12 20:06:00,944 INFO L226 Difference]: Without dead ends: 2363 [2020-10-12 20:06:00,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:06:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-12 20:06:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2345. [2020-10-12 20:06:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2345 states. [2020-10-12 20:06:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3592 transitions. [2020-10-12 20:06:01,116 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3592 transitions. Word has length 70 [2020-10-12 20:06:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:01,116 INFO L479 AbstractCegarLoop]: Abstraction has 2345 states and 3592 transitions. [2020-10-12 20:06:01,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:06:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3592 transitions. [2020-10-12 20:06:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:06:01,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:01,118 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:01,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:06:01,119 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash 956452936, now seen corresponding path program 1 times [2020-10-12 20:06:01,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:01,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502548813] [2020-10-12 20:06:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:01,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:01,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:06:01,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:06:01,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-12 20:06:01,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:01,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:06:01,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:06:01,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 20:06:01,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:01,930 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:01,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:01,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:01,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:01,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:01,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:06:01,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:01,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:01,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:01,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:06:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:01,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502548813] [2020-10-12 20:06:01,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:06:01,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:06:01,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010877166] [2020-10-12 20:06:01,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:06:01,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:06:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:06:01,988 INFO L87 Difference]: Start difference. First operand 2345 states and 3592 transitions. Second operand 5 states. [2020-10-12 20:06:02,233 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-12 20:06:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:03,290 INFO L93 Difference]: Finished difference Result 4767 states and 7355 transitions. [2020-10-12 20:06:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:06:03,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-12 20:06:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:03,307 INFO L225 Difference]: With dead ends: 4767 [2020-10-12 20:06:03,307 INFO L226 Difference]: Without dead ends: 3549 [2020-10-12 20:06:03,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:06:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2020-10-12 20:06:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3529. [2020-10-12 20:06:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3529 states. [2020-10-12 20:06:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 5408 transitions. [2020-10-12 20:06:03,533 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 5408 transitions. Word has length 71 [2020-10-12 20:06:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:03,534 INFO L479 AbstractCegarLoop]: Abstraction has 3529 states and 5408 transitions. [2020-10-12 20:06:03,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:06:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 5408 transitions. [2020-10-12 20:06:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:06:03,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:03,541 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:03,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:06:03,541 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:03,542 INFO L82 PathProgramCache]: Analyzing trace with hash 503006169, now seen corresponding path program 1 times [2020-10-12 20:06:03,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:03,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180577672] [2020-10-12 20:06:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:03,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:03,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:03,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:04,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:04,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:06:04,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:06:04,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-12 20:06:04,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:06:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:06:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 20:06:04,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:04,925 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:04,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:04,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:04,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:04,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:04,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:04,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:06:04,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:04,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:04,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:04,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:04,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:04,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180577672] [2020-10-12 20:06:04,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:06:04,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:06:04,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431069547] [2020-10-12 20:06:04,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:06:04,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:06:04,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:06:04,958 INFO L87 Difference]: Start difference. First operand 3529 states and 5408 transitions. Second operand 8 states. [2020-10-12 20:06:05,249 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-12 20:06:07,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:07,119 INFO L93 Difference]: Finished difference Result 17893 states and 27724 transitions. [2020-10-12 20:06:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:06:07,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-12 20:06:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:07,205 INFO L225 Difference]: With dead ends: 17893 [2020-10-12 20:06:07,205 INFO L226 Difference]: Without dead ends: 16131 [2020-10-12 20:06:07,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:06:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16131 states. [2020-10-12 20:06:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16131 to 6905. [2020-10-12 20:06:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6905 states. [2020-10-12 20:06:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6905 states to 6905 states and 10616 transitions. [2020-10-12 20:06:07,723 INFO L78 Accepts]: Start accepts. Automaton has 6905 states and 10616 transitions. Word has length 71 [2020-10-12 20:06:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:07,724 INFO L479 AbstractCegarLoop]: Abstraction has 6905 states and 10616 transitions. [2020-10-12 20:06:07,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:06:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6905 states and 10616 transitions. [2020-10-12 20:06:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:06:07,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:07,725 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:07,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:06:07,726 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1688627827, now seen corresponding path program 1 times [2020-10-12 20:06:07,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:07,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64214824] [2020-10-12 20:06:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:07,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:07,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:07,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:08,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:10,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:10,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:06:10,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:06:10,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2827 [2020-10-12 20:06:10,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:10,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:06:10,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 20:06:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 20:06:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:06:10,820 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:10,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:10,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:10,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:10,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:10,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:10,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:06:10,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:10,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:10,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:10,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:10,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:10,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64214824] [2020-10-12 20:06:10,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:06:10,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:06:10,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833551671] [2020-10-12 20:06:10,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:06:10,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:10,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:06:10,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:06:10,855 INFO L87 Difference]: Start difference. First operand 6905 states and 10616 transitions. Second operand 8 states. [2020-10-12 20:06:11,052 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-12 20:06:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:13,131 INFO L93 Difference]: Finished difference Result 21805 states and 33636 transitions. [2020-10-12 20:06:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:06:13,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-12 20:06:13,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:13,187 INFO L225 Difference]: With dead ends: 21805 [2020-10-12 20:06:13,188 INFO L226 Difference]: Without dead ends: 19555 [2020-10-12 20:06:13,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:06:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19555 states. [2020-10-12 20:06:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19555 to 8057. [2020-10-12 20:06:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8057 states. [2020-10-12 20:06:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8057 states to 8057 states and 12384 transitions. [2020-10-12 20:06:13,763 INFO L78 Accepts]: Start accepts. Automaton has 8057 states and 12384 transitions. Word has length 72 [2020-10-12 20:06:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:13,763 INFO L479 AbstractCegarLoop]: Abstraction has 8057 states and 12384 transitions. [2020-10-12 20:06:13,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:06:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8057 states and 12384 transitions. [2020-10-12 20:06:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:06:13,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:13,765 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:13,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:06:13,766 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:13,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2105779740, now seen corresponding path program 1 times [2020-10-12 20:06:13,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:13,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651235684] [2020-10-12 20:06:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:13,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:13,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:14,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:14,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:14,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:17,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:17,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:06:17,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:06:17,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3553 [2020-10-12 20:06:17,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:06:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:06:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 20:06:17,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:06:17,534 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:17,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:17,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:17,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:17,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:17,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:17,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:06:17,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:17,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:17,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651235684] [2020-10-12 20:06:17,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:06:17,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:06:17,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971570383] [2020-10-12 20:06:17,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:06:17,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:06:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:06:17,567 INFO L87 Difference]: Start difference. First operand 8057 states and 12384 transitions. Second operand 8 states. [2020-10-12 20:06:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:19,679 INFO L93 Difference]: Finished difference Result 16717 states and 25468 transitions. [2020-10-12 20:06:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:06:19,680 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-12 20:06:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:19,721 INFO L225 Difference]: With dead ends: 16717 [2020-10-12 20:06:19,721 INFO L226 Difference]: Without dead ends: 14467 [2020-10-12 20:06:19,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:06:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14467 states. [2020-10-12 20:06:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14467 to 8098. [2020-10-12 20:06:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8098 states. [2020-10-12 20:06:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8098 states to 8098 states and 12446 transitions. [2020-10-12 20:06:20,233 INFO L78 Accepts]: Start accepts. Automaton has 8098 states and 12446 transitions. Word has length 75 [2020-10-12 20:06:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:20,233 INFO L479 AbstractCegarLoop]: Abstraction has 8098 states and 12446 transitions. [2020-10-12 20:06:20,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:06:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 8098 states and 12446 transitions. [2020-10-12 20:06:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 20:06:20,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:20,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:20,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:06:20,241 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2071794828, now seen corresponding path program 1 times [2020-10-12 20:06:20,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:20,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820037780] [2020-10-12 20:06:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:20,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:20,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:20,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:20,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:23,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:25,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:25,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 20:06:25,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:06:25,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 20:06:25,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:06:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:06:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 20:06:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:06:25,483 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:25,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:25,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:25,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:25,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:25,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:25,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:06:25,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:25,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:06:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 20:06:25,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820037780] [2020-10-12 20:06:25,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:06:25,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 20:06:25,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211392010] [2020-10-12 20:06:25,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:06:25,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:25,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:06:25,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:06:25,529 INFO L87 Difference]: Start difference. First operand 8098 states and 12446 transitions. Second operand 8 states. [2020-10-12 20:06:25,789 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-12 20:06:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:28,149 INFO L93 Difference]: Finished difference Result 23946 states and 36911 transitions. [2020-10-12 20:06:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:06:28,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2020-10-12 20:06:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:28,197 INFO L225 Difference]: With dead ends: 23946 [2020-10-12 20:06:28,197 INFO L226 Difference]: Without dead ends: 20536 [2020-10-12 20:06:28,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:06:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20536 states. [2020-10-12 20:06:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20536 to 9826. [2020-10-12 20:06:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9826 states. [2020-10-12 20:06:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 15098 transitions. [2020-10-12 20:06:28,931 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 15098 transitions. Word has length 97 [2020-10-12 20:06:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:28,932 INFO L479 AbstractCegarLoop]: Abstraction has 9826 states and 15098 transitions. [2020-10-12 20:06:28,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:06:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 15098 transitions. [2020-10-12 20:06:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 20:06:28,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:28,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:28,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:06:28,938 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash 106508148, now seen corresponding path program 1 times [2020-10-12 20:06:28,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:28,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417472145] [2020-10-12 20:06:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:28,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:28,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:29,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:29,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:29,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:29,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:33,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:33,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 20:06:33,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:06:33,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:06:33,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:06:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:06:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 20:06:33,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:34,192 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:34,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:34,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:34,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:34,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:34,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:34,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:06:34,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:34,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:06:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:06:34,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:06:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:34,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417472145] [2020-10-12 20:06:34,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:06:34,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:06:34,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633404076] [2020-10-12 20:06:34,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:06:34,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:06:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:06:34,271 INFO L87 Difference]: Start difference. First operand 9826 states and 15098 transitions. Second operand 8 states. [2020-10-12 20:06:34,464 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-12 20:06:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:37,572 INFO L93 Difference]: Finished difference Result 41242 states and 63014 transitions. [2020-10-12 20:06:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:06:37,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2020-10-12 20:06:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:37,638 INFO L225 Difference]: With dead ends: 41242 [2020-10-12 20:06:37,639 INFO L226 Difference]: Without dead ends: 31496 [2020-10-12 20:06:37,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 20:06:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31496 states. [2020-10-12 20:06:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31496 to 15786. [2020-10-12 20:06:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15786 states. [2020-10-12 20:06:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15786 states to 15786 states and 24058 transitions. [2020-10-12 20:06:38,863 INFO L78 Accepts]: Start accepts. Automaton has 15786 states and 24058 transitions. Word has length 97 [2020-10-12 20:06:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:38,863 INFO L479 AbstractCegarLoop]: Abstraction has 15786 states and 24058 transitions. [2020-10-12 20:06:38,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:06:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 15786 states and 24058 transitions. [2020-10-12 20:06:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 20:06:38,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:38,875 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:38,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:06:38,876 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1328987817, now seen corresponding path program 1 times [2020-10-12 20:06:38,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:38,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442087313] [2020-10-12 20:06:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:38,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:38,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:39,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:39,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:39,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:43,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:43,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 20:06:43,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:06:43,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:06:43,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:06:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:06:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 20:06:43,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:44,112 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:44,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:44,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:44,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:44,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:44,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:44,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:06:44,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:06:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:06:44,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:44,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442087313] [2020-10-12 20:06:44,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:06:44,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:06:44,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597509067] [2020-10-12 20:06:44,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:06:44,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:06:44,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:06:44,176 INFO L87 Difference]: Start difference. First operand 15786 states and 24058 transitions. Second operand 8 states. [2020-10-12 20:06:44,360 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-12 20:06:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:49,282 INFO L93 Difference]: Finished difference Result 74398 states and 112794 transitions. [2020-10-12 20:06:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:06:49,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2020-10-12 20:06:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:49,372 INFO L225 Difference]: With dead ends: 74398 [2020-10-12 20:06:49,372 INFO L226 Difference]: Without dead ends: 58692 [2020-10-12 20:06:49,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:06:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58692 states. [2020-10-12 20:06:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58692 to 24964. [2020-10-12 20:06:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24964 states. [2020-10-12 20:06:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24964 states to 24964 states and 37107 transitions. [2020-10-12 20:06:51,545 INFO L78 Accepts]: Start accepts. Automaton has 24964 states and 37107 transitions. Word has length 97 [2020-10-12 20:06:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:51,546 INFO L479 AbstractCegarLoop]: Abstraction has 24964 states and 37107 transitions. [2020-10-12 20:06:51,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:06:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 24964 states and 37107 transitions. [2020-10-12 20:06:51,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 20:06:51,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:51,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:51,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:06:51,560 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:51,560 INFO L82 PathProgramCache]: Analyzing trace with hash 7738511, now seen corresponding path program 1 times [2020-10-12 20:06:51,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:51,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868912970] [2020-10-12 20:06:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:51,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:51,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:51,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:51,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:53,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:53,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 20:06:53,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:06:53,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2117 [2020-10-12 20:06:53,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:53,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:06:53,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:06:53,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 20:06:53,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:53,909 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:06:53,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:53,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:53,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:53,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:53,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:53,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:06:53,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:53,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:53,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868912970] [2020-10-12 20:06:53,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:06:53,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 20:06:53,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921497375] [2020-10-12 20:06:53,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:06:53,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:06:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:06:53,950 INFO L87 Difference]: Start difference. First operand 24964 states and 37107 transitions. Second operand 6 states. [2020-10-12 20:06:54,137 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:06:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:57,336 INFO L93 Difference]: Finished difference Result 43170 states and 64471 transitions. [2020-10-12 20:06:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:06:57,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-12 20:06:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:57,385 INFO L225 Difference]: With dead ends: 43170 [2020-10-12 20:06:57,386 INFO L226 Difference]: Without dead ends: 33988 [2020-10-12 20:06:57,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:06:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33988 states. [2020-10-12 20:06:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33988 to 33874. [2020-10-12 20:06:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33874 states. [2020-10-12 20:06:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33874 states to 33874 states and 50319 transitions. [2020-10-12 20:06:59,940 INFO L78 Accepts]: Start accepts. Automaton has 33874 states and 50319 transitions. Word has length 98 [2020-10-12 20:06:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:59,940 INFO L479 AbstractCegarLoop]: Abstraction has 33874 states and 50319 transitions. [2020-10-12 20:06:59,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:06:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 33874 states and 50319 transitions. [2020-10-12 20:06:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 20:06:59,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:59,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:59,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:06:59,954 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash -163158679, now seen corresponding path program 1 times [2020-10-12 20:06:59,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:59,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960431731] [2020-10-12 20:06:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:59,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:00,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:00,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:04,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:04,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:07:04,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 20:07:04,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:07:04,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 20:07:04,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:07:04,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:07:04,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:07:04,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 20:07:04,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:07:05,213 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 38 [2020-10-12 20:07:05,478 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:07:05,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:07:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:07:05,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:05,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:07:05,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:07:05,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:07:05,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:07:05,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:07:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:07:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:07:05,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:07:05,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:07:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:07:05,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960431731] [2020-10-12 20:07:05,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:07:05,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 20:07:05,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188197474] [2020-10-12 20:07:05,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:07:05,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:07:05,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:07:05,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:07:05,541 INFO L87 Difference]: Start difference. First operand 33874 states and 50319 transitions. Second operand 10 states. [2020-10-12 20:07:05,744 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-12 20:07:06,267 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 20:07:07,048 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 20:07:07,343 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-12 20:07:07,623 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-12 20:07:07,784 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-12 20:07:08,345 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-12 20:07:11,591 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-12 20:07:13,345 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-12 20:07:14,095 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 20:07:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:07:29,850 INFO L93 Difference]: Finished difference Result 203502 states and 302407 transitions. [2020-10-12 20:07:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 20:07:29,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-10-12 20:07:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:07:30,136 INFO L225 Difference]: With dead ends: 203502 [2020-10-12 20:07:30,136 INFO L226 Difference]: Without dead ends: 191830 [2020-10-12 20:07:30,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-10-12 20:07:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191830 states. [2020-10-12 20:07:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191830 to 70274. [2020-10-12 20:07:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70274 states. [2020-10-12 20:07:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70274 states to 70274 states and 104333 transitions. [2020-10-12 20:07:39,882 INFO L78 Accepts]: Start accepts. Automaton has 70274 states and 104333 transitions. Word has length 99 [2020-10-12 20:07:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:07:39,882 INFO L479 AbstractCegarLoop]: Abstraction has 70274 states and 104333 transitions. [2020-10-12 20:07:39,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:07:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 70274 states and 104333 transitions. [2020-10-12 20:07:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 20:07:39,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:07:39,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:07:39,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:07:39,899 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:07:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:07:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash -394432146, now seen corresponding path program 1 times [2020-10-12 20:07:39,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:07:39,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885625444] [2020-10-12 20:07:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:07:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:07:39,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:39,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:39,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:40,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:40,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:40,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:42,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:42,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:43,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:43,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:44,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:44,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:07:44,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 20:07:44,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 20:07:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:07:44,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:07:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:07:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:07:44,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 20:07:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:07:45,397 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:07:45,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:07:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:07:45,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:07:45,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:07:45,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:07:45,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:07:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:07:45,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:07:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:07:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:07:45,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:07:45,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:07:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:07:45,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885625444] [2020-10-12 20:07:45,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:07:45,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 20:07:45,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712403460] [2020-10-12 20:07:45,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:07:45,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:07:45,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:07:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:07:45,440 INFO L87 Difference]: Start difference. First operand 70274 states and 104333 transitions. Second operand 12 states. [2020-10-12 20:07:45,667 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 20:08:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:34,073 INFO L93 Difference]: Finished difference Result 344626 states and 513537 transitions. [2020-10-12 20:08:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 20:08:34,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2020-10-12 20:08:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:34,543 INFO L225 Difference]: With dead ends: 344626 [2020-10-12 20:08:34,543 INFO L226 Difference]: Without dead ends: 320260 [2020-10-12 20:08:34,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=545, Invalid=1807, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 20:08:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320260 states. [2020-10-12 20:08:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320260 to 73262. [2020-10-12 20:08:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73262 states. [2020-10-12 20:08:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73262 states to 73262 states and 108725 transitions. [2020-10-12 20:08:45,572 INFO L78 Accepts]: Start accepts. Automaton has 73262 states and 108725 transitions. Word has length 99 [2020-10-12 20:08:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:45,572 INFO L479 AbstractCegarLoop]: Abstraction has 73262 states and 108725 transitions. [2020-10-12 20:08:45,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:08:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 73262 states and 108725 transitions. [2020-10-12 20:08:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 20:08:45,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:45,589 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:45,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:08:45,590 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:45,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1842656607, now seen corresponding path program 1 times [2020-10-12 20:08:45,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:45,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782576805] [2020-10-12 20:08:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:45,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:45,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:45,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:45,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:45,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:49,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:50,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:50,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:50,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:50,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:50,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 20:08:50,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 20:08:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:08:50,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:08:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:08:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 20:08:50,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:50,991 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:50,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:50,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:50,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:51,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:51,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:51,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:08:51,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:51,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:51,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782576805] [2020-10-12 20:08:51,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:08:51,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 20:08:51,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902211482] [2020-10-12 20:08:51,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:08:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:08:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:08:51,022 INFO L87 Difference]: Start difference. First operand 73262 states and 108725 transitions. Second operand 12 states. [2020-10-12 20:08:51,206 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 148