/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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:52:17,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:52:17,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:52:17,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:52:17,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:52:17,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:52:17,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:52:17,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:52:17,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:52:17,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:52:17,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:52:17,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:52:17,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:52:17,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:52:17,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:52:17,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:52:17,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:52:17,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:52:17,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:52:17,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:52:17,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:52:17,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:52:17,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:52:17,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:52:17,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:52:17,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:52:17,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:52:17,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:52:17,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:52:17,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:52:17,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:52:17,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:52:17,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:52:17,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:52:17,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:52:17,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:52:17,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:52:17,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:52:17,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:52:17,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:52:17,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:52:17,271 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 19:52:17,320 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:52:17,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:52:17,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:52:17,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:52:17,324 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:52:17,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:52:17,324 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:52:17,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:52:17,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:52:17,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:52:17,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:52:17,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:52:17,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:52:17,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:52:17,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:52:17,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:52:17,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:52:17,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:52:17,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:52:17,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:52:17,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:52:17,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:52:17,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:52:17,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:52:17,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:52:17,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:52:17,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:52:17,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:52:17,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:52:17,330 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 19:52:17,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:52:17,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:52:17,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:52:17,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:52:17,643 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:52:17,644 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:52:17,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0007eb860/8462f2b02c0649b08e85780fba1e8d66/FLAG98771b71d [2020-10-12 19:52:18,215 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:52:18,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:52:18,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0007eb860/8462f2b02c0649b08e85780fba1e8d66/FLAG98771b71d [2020-10-12 19:52:18,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0007eb860/8462f2b02c0649b08e85780fba1e8d66 [2020-10-12 19:52:18,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:52:18,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:52:18,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:52:18,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:52:18,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:52:18,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:52:18" (1/1) ... [2020-10-12 19:52:18,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a35e781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:18, skipping insertion in model container [2020-10-12 19:52:18,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:52:18" (1/1) ... [2020-10-12 19:52:18,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:52:18,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:52:18,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:52:18,932 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:52:19,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:52:19,099 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:52:19,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19 WrapperNode [2020-10-12 19:52:19,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:52:19,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:52:19,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:52:19,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:52:19,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (1/1) ... [2020-10-12 19:52:19,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (1/1) ... [2020-10-12 19:52:19,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (1/1) ... [2020-10-12 19:52:19,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (1/1) ... [2020-10-12 19:52:19,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (1/1) ... [2020-10-12 19:52:19,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (1/1) ... [2020-10-12 19:52:19,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (1/1) ... [2020-10-12 19:52:19,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:52:19,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:52:19,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:52:19,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:52:19,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (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 19:52:19,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:52:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:52:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:52:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:52:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:52:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:52:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:52:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:52:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:52:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:52:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:52:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:52:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:52:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:52:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:52:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:52:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:52:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:52:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:52:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:52:19,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:52:19,723 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:52:19,723 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:52:19,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:52:19 BoogieIcfgContainer [2020-10-12 19:52:19,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:52:19,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:52:19,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:52:19,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:52:19,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:52:18" (1/3) ... [2020-10-12 19:52:19,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d45840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:52:19, skipping insertion in model container [2020-10-12 19:52:19,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:52:19" (2/3) ... [2020-10-12 19:52:19,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d45840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:52:19, skipping insertion in model container [2020-10-12 19:52:19,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:52:19" (3/3) ... [2020-10-12 19:52:19,737 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:52:19,750 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:52:19,757 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:52:19,769 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:52:19,796 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:52:19,797 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:52:19,797 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:52:19,797 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:52:19,797 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:52:19,797 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:52:19,798 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:52:19,798 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:52:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-10-12 19:52:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:52:19,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:19,830 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] [2020-10-12 19:52:19,830 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1677922447, now seen corresponding path program 1 times [2020-10-12 19:52:19,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:19,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447183645] [2020-10-12 19:52:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:20,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:20,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:20,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:21,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:21,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:52:21,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:52:21,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-12 19:52:21,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:52:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:52:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:52:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:52:21,383 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 19:52:21,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:21,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:21,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:21,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:21,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:21,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:52:21,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:21,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:21,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:21,441 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 19:52:21,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447183645] [2020-10-12 19:52:21,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:21,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:52:21,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887767174] [2020-10-12 19:52:21,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:52:21,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:21,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:52:21,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:52:21,469 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 6 states. [2020-10-12 19:52:21,651 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 19:52:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:22,141 INFO L93 Difference]: Finished difference Result 364 states and 567 transitions. [2020-10-12 19:52:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:52:22,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-12 19:52:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:22,162 INFO L225 Difference]: With dead ends: 364 [2020-10-12 19:52:22,162 INFO L226 Difference]: Without dead ends: 280 [2020-10-12 19:52:22,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:52:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-12 19:52:22,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 150. [2020-10-12 19:52:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-12 19:52:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 223 transitions. [2020-10-12 19:52:22,232 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 223 transitions. Word has length 42 [2020-10-12 19:52:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:22,233 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 223 transitions. [2020-10-12 19:52:22,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:52:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 223 transitions. [2020-10-12 19:52:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:52:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:22,236 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] [2020-10-12 19:52:22,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:52:22,237 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 457455518, now seen corresponding path program 1 times [2020-10-12 19:52:22,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:22,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552473928] [2020-10-12 19:52:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:22,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:22,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:52:22,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:52:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-12 19:52:22,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:52:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 19:52:22,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:52:22,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:22,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:22,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:22,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:22,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:22,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:22,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:52:22,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:22,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:22,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:22,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:22,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:22,986 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 19:52:22,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552473928] [2020-10-12 19:52:22,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:22,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:52:22,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598816945] [2020-10-12 19:52:22,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:52:22,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:22,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:52:22,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:52:22,991 INFO L87 Difference]: Start difference. First operand 150 states and 223 transitions. Second operand 5 states. [2020-10-12 19:52:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:23,542 INFO L93 Difference]: Finished difference Result 280 states and 426 transitions. [2020-10-12 19:52:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:52:23,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-12 19:52:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:23,545 INFO L225 Difference]: With dead ends: 280 [2020-10-12 19:52:23,546 INFO L226 Difference]: Without dead ends: 278 [2020-10-12 19:52:23,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:52:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-12 19:52:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 154. [2020-10-12 19:52:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 19:52:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 227 transitions. [2020-10-12 19:52:23,565 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 227 transitions. Word has length 43 [2020-10-12 19:52:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:23,566 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 227 transitions. [2020-10-12 19:52:23,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:52:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 227 transitions. [2020-10-12 19:52:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:52:23,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:23,568 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] [2020-10-12 19:52:23,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:52:23,569 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1305838878, now seen corresponding path program 1 times [2020-10-12 19:52:23,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:23,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217367379] [2020-10-12 19:52:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:23,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:23,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:23,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:23,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:52:23,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:52:23,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-12 19:52:23,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:52:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:52:23,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:24,109 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 19:52:24,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:24,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:24,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:24,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:24,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:52:24,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:24,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:24,145 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 19:52:24,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217367379] [2020-10-12 19:52:24,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:24,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:52:24,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890384410] [2020-10-12 19:52:24,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:52:24,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:24,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:52:24,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:52:24,149 INFO L87 Difference]: Start difference. First operand 154 states and 227 transitions. Second operand 4 states. [2020-10-12 19:52:24,294 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 19:52:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:24,593 INFO L93 Difference]: Finished difference Result 400 states and 609 transitions. [2020-10-12 19:52:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:52:24,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-12 19:52:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:24,596 INFO L225 Difference]: With dead ends: 400 [2020-10-12 19:52:24,597 INFO L226 Difference]: Without dead ends: 270 [2020-10-12 19:52:24,598 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 19:52:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-12 19:52:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2020-10-12 19:52:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-12 19:52:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 399 transitions. [2020-10-12 19:52:24,624 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 399 transitions. Word has length 44 [2020-10-12 19:52:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:24,624 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 399 transitions. [2020-10-12 19:52:24,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:52:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 399 transitions. [2020-10-12 19:52:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:52:24,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:24,628 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] [2020-10-12 19:52:24,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:52:24,628 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1881734104, now seen corresponding path program 1 times [2020-10-12 19:52:24,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:24,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267854593] [2020-10-12 19:52:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:24,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:24,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:25,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:25,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:52:25,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:52:25,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-12 19:52:25,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:25,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:52:25,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:52:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 19:52:25,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:25,612 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 19:52:25,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:25,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:25,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:25,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:25,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:52:25,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:25,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:25,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-12 19:52:25,662 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 19:52:25,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267854593] [2020-10-12 19:52:25,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:25,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:52:25,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827790329] [2020-10-12 19:52:25,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:52:25,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:25,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:52:25,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:52:25,666 INFO L87 Difference]: Start difference. First operand 266 states and 399 transitions. Second operand 5 states. [2020-10-12 19:52:25,948 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:52:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:26,626 INFO L93 Difference]: Finished difference Result 526 states and 802 transitions. [2020-10-12 19:52:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:52:26,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-12 19:52:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:26,632 INFO L225 Difference]: With dead ends: 526 [2020-10-12 19:52:26,632 INFO L226 Difference]: Without dead ends: 396 [2020-10-12 19:52:26,636 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 19:52:26,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-12 19:52:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 390. [2020-10-12 19:52:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-12 19:52:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 591 transitions. [2020-10-12 19:52:26,690 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 591 transitions. Word has length 45 [2020-10-12 19:52:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:26,691 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 591 transitions. [2020-10-12 19:52:26,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:52:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 591 transitions. [2020-10-12 19:52:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:52:26,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:26,701 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] [2020-10-12 19:52:26,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:52:26,702 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash -678768179, now seen corresponding path program 1 times [2020-10-12 19:52:26,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:26,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538698698] [2020-10-12 19:52:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:26,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:26,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:26,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:26,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:27,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:28,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:28,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:52:28,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:52:28,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1293 [2020-10-12 19:52:28,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:52:28,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:28,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:52:28,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:28,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:28,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:28,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:28,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:28,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:28,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:52:28,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:28,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:28,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:28,325 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 19:52:28,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538698698] [2020-10-12 19:52:28,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:28,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:52:28,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963662648] [2020-10-12 19:52:28,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:52:28,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:52:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:52:28,329 INFO L87 Difference]: Start difference. First operand 390 states and 591 transitions. Second operand 7 states. [2020-10-12 19:52:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:29,031 INFO L93 Difference]: Finished difference Result 1203 states and 1841 transitions. [2020-10-12 19:52:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:52:29,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-12 19:52:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:29,037 INFO L225 Difference]: With dead ends: 1203 [2020-10-12 19:52:29,037 INFO L226 Difference]: Without dead ends: 837 [2020-10-12 19:52:29,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:52:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-10-12 19:52:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 420. [2020-10-12 19:52:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-12 19:52:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 635 transitions. [2020-10-12 19:52:29,098 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 635 transitions. Word has length 45 [2020-10-12 19:52:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:29,098 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 635 transitions. [2020-10-12 19:52:29,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:52:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 635 transitions. [2020-10-12 19:52:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:52:29,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:29,101 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] [2020-10-12 19:52:29,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:52:29,102 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:29,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1165604010, now seen corresponding path program 1 times [2020-10-12 19:52:29,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:29,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070797224] [2020-10-12 19:52:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:29,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:29,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:30,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:30,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:52:30,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:52:30,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1365 [2020-10-12 19:52:30,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:30,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:52:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:30,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:52:30,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:52:30,672 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 19:52:30,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:30,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:30,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:30,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:30,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:30,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 19:52:30,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:30,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:30,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:30,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:30,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:52:30,726 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 19:52:30,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070797224] [2020-10-12 19:52:30,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:30,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:52:30,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445264411] [2020-10-12 19:52:30,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:52:30,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:52:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:52:30,731 INFO L87 Difference]: Start difference. First operand 420 states and 635 transitions. Second operand 7 states. [2020-10-12 19:52:30,901 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 19:52:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:31,522 INFO L93 Difference]: Finished difference Result 969 states and 1473 transitions. [2020-10-12 19:52:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:52:31,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-12 19:52:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:31,530 INFO L225 Difference]: With dead ends: 969 [2020-10-12 19:52:31,530 INFO L226 Difference]: Without dead ends: 783 [2020-10-12 19:52:31,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:52:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-10-12 19:52:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 474. [2020-10-12 19:52:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2020-10-12 19:52:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 719 transitions. [2020-10-12 19:52:31,595 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 719 transitions. Word has length 45 [2020-10-12 19:52:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:31,595 INFO L479 AbstractCegarLoop]: Abstraction has 474 states and 719 transitions. [2020-10-12 19:52:31,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:52:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 719 transitions. [2020-10-12 19:52:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 19:52:31,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:31,596 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] [2020-10-12 19:52:31,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:52:31,597 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash 769168036, now seen corresponding path program 1 times [2020-10-12 19:52:31,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:31,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907229497] [2020-10-12 19:52:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:31,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:31,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:31,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:32,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:35,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:35,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 19:52:35,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:52:35,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3444 [2020-10-12 19:52:35,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:35,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:52:35,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:35,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 19:52:35,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:35,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:35,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:35,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:35,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:35,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:52:35,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:35,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:35,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:35,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:35,250 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 19:52:35,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907229497] [2020-10-12 19:52:35,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:52:35,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:52:35,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928759150] [2020-10-12 19:52:35,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:52:35,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:52:35,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:52:35,254 INFO L87 Difference]: Start difference. First operand 474 states and 719 transitions. Second operand 7 states. [2020-10-12 19:52:35,398 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-12 19:52:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:36,085 INFO L93 Difference]: Finished difference Result 1081 states and 1659 transitions. [2020-10-12 19:52:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:52:36,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-12 19:52:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:36,093 INFO L225 Difference]: With dead ends: 1081 [2020-10-12 19:52:36,093 INFO L226 Difference]: Without dead ends: 795 [2020-10-12 19:52:36,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:52:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-12 19:52:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 452. [2020-10-12 19:52:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2020-10-12 19:52:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 684 transitions. [2020-10-12 19:52:36,157 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 684 transitions. Word has length 46 [2020-10-12 19:52:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:36,157 INFO L479 AbstractCegarLoop]: Abstraction has 452 states and 684 transitions. [2020-10-12 19:52:36,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:52:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 684 transitions. [2020-10-12 19:52:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:52:36,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:36,160 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] [2020-10-12 19:52:36,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:52:36,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash -708208766, now seen corresponding path program 1 times [2020-10-12 19:52:36,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:36,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002096988] [2020-10-12 19:52:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:36,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:36,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:38,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:41,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:41,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:52:41,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:52:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:52:41,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:52:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:52:41,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:41,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:41,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:41,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:41,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:41,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:41,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:52:41,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:41,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:41,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:41,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:41,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:41,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002096988] [2020-10-12 19:52:41,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:52:41,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:52:41,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746930129] [2020-10-12 19:52:41,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:52:41,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:41,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:52:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:52:41,452 INFO L87 Difference]: Start difference. First operand 452 states and 684 transitions. Second operand 8 states. [2020-10-12 19:52:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:42,348 INFO L93 Difference]: Finished difference Result 2204 states and 3358 transitions. [2020-10-12 19:52:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:52:42,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-12 19:52:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:42,358 INFO L225 Difference]: With dead ends: 2204 [2020-10-12 19:52:42,359 INFO L226 Difference]: Without dead ends: 1812 [2020-10-12 19:52:42,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:52:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2020-10-12 19:52:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 886. [2020-10-12 19:52:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-10-12 19:52:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1317 transitions. [2020-10-12 19:52:42,460 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1317 transitions. Word has length 63 [2020-10-12 19:52:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:42,461 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1317 transitions. [2020-10-12 19:52:42,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:52:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1317 transitions. [2020-10-12 19:52:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:52:42,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:42,463 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] [2020-10-12 19:52:42,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:52:42,463 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1195044597, now seen corresponding path program 1 times [2020-10-12 19:52:42,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:42,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900074772] [2020-10-12 19:52:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:42,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:44,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:47,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:47,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:52:47,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:52:47,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:52:47,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:47,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:52:47,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:47,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 19:52:47,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:47,765 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 19:52:47,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:47,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:47,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:47,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:47,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:52:47,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:47,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:47,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900074772] [2020-10-12 19:52:47,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:52:47,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:52:47,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714013169] [2020-10-12 19:52:47,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:52:47,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:52:47,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:52:47,832 INFO L87 Difference]: Start difference. First operand 886 states and 1317 transitions. Second operand 8 states. [2020-10-12 19:52:48,013 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 19:52:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:49,415 INFO L93 Difference]: Finished difference Result 4082 states and 6017 transitions. [2020-10-12 19:52:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:52:49,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-12 19:52:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:49,435 INFO L225 Difference]: With dead ends: 4082 [2020-10-12 19:52:49,435 INFO L226 Difference]: Without dead ends: 3271 [2020-10-12 19:52:49,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:52:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-12 19:52:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 1682. [2020-10-12 19:52:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1682 states. [2020-10-12 19:52:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2444 transitions. [2020-10-12 19:52:49,725 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2444 transitions. Word has length 63 [2020-10-12 19:52:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:49,726 INFO L479 AbstractCegarLoop]: Abstraction has 1682 states and 2444 transitions. [2020-10-12 19:52:49,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:52:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2444 transitions. [2020-10-12 19:52:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:52:49,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:49,729 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-12 19:52:49,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:52:49,730 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:49,730 INFO L82 PathProgramCache]: Analyzing trace with hash 941640339, now seen corresponding path program 1 times [2020-10-12 19:52:49,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:49,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333886867] [2020-10-12 19:52:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:49,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:49,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:49,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:49,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:50,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:53,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:53,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:52:53,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:52:53,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3380 [2020-10-12 19:52:53,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:53,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:52:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:52:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:52:53,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:53,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:53,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:53,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:53,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:53,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:53,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:52:53,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:52:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:53,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:52:53,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:52:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:53,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333886867] [2020-10-12 19:52:53,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:52:53,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:52:53,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802040144] [2020-10-12 19:52:53,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:52:53,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:53,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:52:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:52:53,299 INFO L87 Difference]: Start difference. First operand 1682 states and 2444 transitions. Second operand 6 states. [2020-10-12 19:52:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:52:54,114 INFO L93 Difference]: Finished difference Result 2826 states and 4136 transitions. [2020-10-12 19:52:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:52:54,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-12 19:52:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:52:54,127 INFO L225 Difference]: With dead ends: 2826 [2020-10-12 19:52:54,127 INFO L226 Difference]: Without dead ends: 2248 [2020-10-12 19:52:54,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:52:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2020-10-12 19:52:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2234. [2020-10-12 19:52:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2234 states. [2020-10-12 19:52:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3252 transitions. [2020-10-12 19:52:54,397 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3252 transitions. Word has length 64 [2020-10-12 19:52:54,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:52:54,398 INFO L479 AbstractCegarLoop]: Abstraction has 2234 states and 3252 transitions. [2020-10-12 19:52:54,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:52:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3252 transitions. [2020-10-12 19:52:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:52:54,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:52:54,400 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:52:54,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:52:54,401 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:52:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:52:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash -143490161, now seen corresponding path program 1 times [2020-10-12 19:52:54,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:52:54,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143864934] [2020-10-12 19:52:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:52:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:54,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:54,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:56,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:59,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:52:59,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:52:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:52:59,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:52:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:52:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:52:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:59,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:52:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:52:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:52:59,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:52:59,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:52:59,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:52:59,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:52:59,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:52:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:52:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:52:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:52:59,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:52:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:52:59,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143864934] [2020-10-12 19:52:59,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:52:59,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:52:59,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392200867] [2020-10-12 19:52:59,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:52:59,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:52:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:52:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:52:59,634 INFO L87 Difference]: Start difference. First operand 2234 states and 3252 transitions. Second operand 8 states. [2020-10-12 19:53:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:00,836 INFO L93 Difference]: Finished difference Result 7402 states and 10680 transitions. [2020-10-12 19:53:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:53:00,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-12 19:53:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:00,862 INFO L225 Difference]: With dead ends: 7402 [2020-10-12 19:53:00,863 INFO L226 Difference]: Without dead ends: 5197 [2020-10-12 19:53:00,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:53:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2020-10-12 19:53:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 2602. [2020-10-12 19:53:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2602 states. [2020-10-12 19:53:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 3641 transitions. [2020-10-12 19:53:01,172 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 3641 transitions. Word has length 64 [2020-10-12 19:53:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:01,172 INFO L479 AbstractCegarLoop]: Abstraction has 2602 states and 3641 transitions. [2020-10-12 19:53:01,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:53:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 3641 transitions. [2020-10-12 19:53:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:53:01,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:01,176 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] [2020-10-12 19:53:01,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:53:01,176 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:01,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1517242453, now seen corresponding path program 1 times [2020-10-12 19:53:01,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:01,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541230611] [2020-10-12 19:53:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:01,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:03,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:03,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:03,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:03,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:03,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:53:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:06,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:53:06,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:06,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:06,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:06,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:06,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:06,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:06,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:53:06,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:06,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:06,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:06,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541230611] [2020-10-12 19:53:06,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:06,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:53:06,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314002372] [2020-10-12 19:53:06,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:53:06,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:53:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:53:06,468 INFO L87 Difference]: Start difference. First operand 2602 states and 3641 transitions. Second operand 12 states. [2020-10-12 19:53:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:11,927 INFO L93 Difference]: Finished difference Result 30304 states and 42435 transitions. [2020-10-12 19:53:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 19:53:11,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-12 19:53:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:12,011 INFO L225 Difference]: With dead ends: 30304 [2020-10-12 19:53:12,011 INFO L226 Difference]: Without dead ends: 27726 [2020-10-12 19:53:12,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=842, Invalid=3580, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 19:53:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27726 states. [2020-10-12 19:53:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27726 to 16022. [2020-10-12 19:53:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16022 states. [2020-10-12 19:53:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16022 states to 16022 states and 22677 transitions. [2020-10-12 19:53:13,758 INFO L78 Accepts]: Start accepts. Automaton has 16022 states and 22677 transitions. Word has length 65 [2020-10-12 19:53:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:13,758 INFO L479 AbstractCegarLoop]: Abstraction has 16022 states and 22677 transitions. [2020-10-12 19:53:13,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:53:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 16022 states and 22677 transitions. [2020-10-12 19:53:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:53:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:13,764 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] [2020-10-12 19:53:13,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:53:13,764 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash 387983248, now seen corresponding path program 1 times [2020-10-12 19:53:13,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:13,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918790597] [2020-10-12 19:53:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:13,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:13,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:13,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:14,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:16,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:18,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:53:18,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:53:18,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:53:18,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:18,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:53:18,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:53:18,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:53:18,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:19,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:19,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:19,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:19,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:53:19,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:19,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:19,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918790597] [2020-10-12 19:53:19,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:19,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:53:19,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733141545] [2020-10-12 19:53:19,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:53:19,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:53:19,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:53:19,211 INFO L87 Difference]: Start difference. First operand 16022 states and 22677 transitions. Second operand 10 states. [2020-10-12 19:53:19,555 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2020-10-12 19:53:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:24,970 INFO L93 Difference]: Finished difference Result 42234 states and 59291 transitions. [2020-10-12 19:53:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:53:24,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-12 19:53:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:25,045 INFO L225 Difference]: With dead ends: 42234 [2020-10-12 19:53:25,046 INFO L226 Difference]: Without dead ends: 34034 [2020-10-12 19:53:25,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:53:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34034 states. [2020-10-12 19:53:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34034 to 19578. [2020-10-12 19:53:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19578 states. [2020-10-12 19:53:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19578 states to 19578 states and 27613 transitions. [2020-10-12 19:53:28,243 INFO L78 Accepts]: Start accepts. Automaton has 19578 states and 27613 transitions. Word has length 65 [2020-10-12 19:53:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:28,243 INFO L479 AbstractCegarLoop]: Abstraction has 19578 states and 27613 transitions. [2020-10-12 19:53:28,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:53:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 19578 states and 27613 transitions. [2020-10-12 19:53:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:53:28,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:28,248 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:53:28,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:53:28,249 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:28,249 INFO L82 PathProgramCache]: Analyzing trace with hash -431224501, now seen corresponding path program 1 times [2020-10-12 19:53:28,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:28,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409013001] [2020-10-12 19:53:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:28,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:29,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:29,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:29,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:29,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:33,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:33,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:53:33,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:53:33,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:53:33,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:33,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:53:33,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:53:33,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:53:33,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:33,496 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-12 19:53:33,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:33,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:33,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:33,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:33,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:33,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:53:33,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:33,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:33,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409013001] [2020-10-12 19:53:33,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:33,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:53:33,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760694879] [2020-10-12 19:53:33,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:53:33,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:53:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:53:33,665 INFO L87 Difference]: Start difference. First operand 19578 states and 27613 transitions. Second operand 12 states. [2020-10-12 19:54:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:06,370 INFO L93 Difference]: Finished difference Result 273562 states and 379761 transitions. [2020-10-12 19:54:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 19:54:06,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-12 19:54:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:07,089 INFO L225 Difference]: With dead ends: 273562 [2020-10-12 19:54:07,090 INFO L226 Difference]: Without dead ends: 254008 [2020-10-12 19:54:07,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=722, Invalid=2700, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 19:54:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254008 states. [2020-10-12 19:54:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254008 to 76718. [2020-10-12 19:54:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76718 states. [2020-10-12 19:54:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76718 states to 76718 states and 108217 transitions. [2020-10-12 19:54:19,831 INFO L78 Accepts]: Start accepts. Automaton has 76718 states and 108217 transitions. Word has length 66 [2020-10-12 19:54:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:19,831 INFO L479 AbstractCegarLoop]: Abstraction has 76718 states and 108217 transitions. [2020-10-12 19:54:19,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:54:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 76718 states and 108217 transitions. [2020-10-12 19:54:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:54:19,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:19,837 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:54:19,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:54:19,837 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2019116952, now seen corresponding path program 1 times [2020-10-12 19:54:19,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:19,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616202575] [2020-10-12 19:54:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:19,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:19,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:19,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:19,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:20,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:20,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:20,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:24,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:54:24,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:25,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:25,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:25,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:25,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:25,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:25,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:54:25,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:25,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:25,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616202575] [2020-10-12 19:54:25,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:54:25,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:54:25,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262065479] [2020-10-12 19:54:25,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:54:25,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:54:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:54:25,197 INFO L87 Difference]: Start difference. First operand 76718 states and 108217 transitions. Second operand 12 states. [2020-10-12 19:54:25,384 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 19:55:28,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:28,780 INFO L93 Difference]: Finished difference Result 523396 states and 738342 transitions. [2020-10-12 19:55:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 19:55:28,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-12 19:55:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:29,543 INFO L225 Difference]: With dead ends: 523396 [2020-10-12 19:55:29,543 INFO L226 Difference]: Without dead ends: 446702 [2020-10-12 19:55:29,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=366, Invalid=1194, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 19:55:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446702 states.