/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=NARROWEST --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.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:37:06,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:37:06,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:37:06,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:37:06,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:37:06,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:37:06,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:37:06,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:37:06,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:37:06,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:37:06,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:37:06,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:37:06,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:37:06,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:37:06,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:37:06,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:37:06,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:37:06,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:37:06,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:37:06,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:37:06,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:37:06,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:37:06,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:37:06,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:37:06,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:37:06,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:37:06,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:37:06,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:37:06,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:37:06,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:37:06,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:37:06,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:37:06,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:37:06,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:37:06,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:37:06,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:37:06,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:37:06,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:37:06,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:37:06,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:37:06,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:37:06,251 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 [2020-10-13 14:37:06,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:37:06,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:37:06,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:37:06,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:37:06,300 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:37:06,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:37:06,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:37:06,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:37:06,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:37:06,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:37:06,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:37:06,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:37:06,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:37:06,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:37:06,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:37:06,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:37:06,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:37:06,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:37:06,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:37:06,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:37:06,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:37:06,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:37:06,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:37:06,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:37:06,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:37:06,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:37:06,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:37:06,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:37:06,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:37:06,307 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:37:06,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:37:06,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:37:06,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:37:06,612 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:37:06,613 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:37:06,613 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-13 14:37:06,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ec213618/213ac2d29f3742e5b8203d9cec13154d/FLAG11accb888 [2020-10-13 14:37:07,456 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:37:07,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-13 14:37:07,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ec213618/213ac2d29f3742e5b8203d9cec13154d/FLAG11accb888 [2020-10-13 14:37:07,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ec213618/213ac2d29f3742e5b8203d9cec13154d [2020-10-13 14:37:07,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:37:07,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:37:07,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:37:07,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:37:07,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:37:07,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:37:07" (1/1) ... [2020-10-13 14:37:07,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3c37b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:07, skipping insertion in model container [2020-10-13 14:37:07,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:37:07" (1/1) ... [2020-10-13 14:37:07,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:37:07,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:37:08,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:37:08,970 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:37:09,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:37:09,614 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:37:09,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09 WrapperNode [2020-10-13 14:37:09,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:37:09,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:37:09,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:37:09,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:37:09,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (1/1) ... [2020-10-13 14:37:09,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (1/1) ... [2020-10-13 14:37:09,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (1/1) ... [2020-10-13 14:37:09,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (1/1) ... [2020-10-13 14:37:09,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (1/1) ... [2020-10-13 14:37:09,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (1/1) ... [2020-10-13 14:37:09,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (1/1) ... [2020-10-13 14:37:09,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:37:09,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:37:09,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:37:09,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:37:09,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (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 [2020-10-13 14:37:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:37:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:37:09,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:37:09,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:37:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:37:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:37:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:37:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:37:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:37:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:37:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:37:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:37:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:37:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:37:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:37:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:37:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:37:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:37:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:37:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:37:13,863 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:37:13,864 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:37:13,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:37:13 BoogieIcfgContainer [2020-10-13 14:37:13,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:37:13,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:37:13,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:37:13,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:37:13,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:37:07" (1/3) ... [2020-10-13 14:37:13,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10452d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:37:13, skipping insertion in model container [2020-10-13 14:37:13,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:37:09" (2/3) ... [2020-10-13 14:37:13,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10452d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:37:13, skipping insertion in model container [2020-10-13 14:37:13,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:37:13" (3/3) ... [2020-10-13 14:37:13,884 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-13 14:37:13,895 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:37:13,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-10-13 14:37:13,919 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-13 14:37:13,949 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:37:13,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:37:13,950 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:37:13,950 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:37:13,950 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:37:13,950 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:37:13,950 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:37:13,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:37:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states. [2020-10-13 14:37:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:37:14,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:37:14,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:37:14,012 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:37:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:37:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1856988322, now seen corresponding path program 1 times [2020-10-13 14:37:14,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:37:14,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568557685] [2020-10-13 14:37:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:37:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:14,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:14,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:15,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:16,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:16,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:16,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:19,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:19,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:37:19,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:37:19,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 14:37:19,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:19,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:37:19,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:37:19,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:37:19,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:37:21,153 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:37:21,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:37:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:21,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:21,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:21,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:37:21,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:37:21,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 14:37:21,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:37:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:37:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:37:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:37:21,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568557685] [2020-10-13 14:37:21,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:37:21,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:37:21,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802021364] [2020-10-13 14:37:21,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:37:21,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:37:21,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:37:21,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:37:21,315 INFO L87 Difference]: Start difference. First operand 1295 states. Second operand 6 states. [2020-10-13 14:37:22,922 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-13 14:37:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:37:33,983 INFO L93 Difference]: Finished difference Result 2522 states and 4334 transitions. [2020-10-13 14:37:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:37:33,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-13 14:37:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:37:34,018 INFO L225 Difference]: With dead ends: 2522 [2020-10-13 14:37:34,018 INFO L226 Difference]: Without dead ends: 1594 [2020-10-13 14:37:34,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:37:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-10-13 14:37:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1588. [2020-10-13 14:37:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2020-10-13 14:37:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2070 transitions. [2020-10-13 14:37:34,193 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2070 transitions. Word has length 56 [2020-10-13 14:37:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:37:34,193 INFO L479 AbstractCegarLoop]: Abstraction has 1588 states and 2070 transitions. [2020-10-13 14:37:34,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:37:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2070 transitions. [2020-10-13 14:37:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:37:34,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:37:34,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:37:34,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:37:34,207 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:37:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:37:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash -108202759, now seen corresponding path program 1 times [2020-10-13 14:37:34,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:37:34,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309028922] [2020-10-13 14:37:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:37:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:34,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:34,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:34,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:35,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:37,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:37,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:38,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:39,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:39,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:37:39,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:37:39,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 14:37:39,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:37:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:37:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:37:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:37:40,863 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:37:40,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:37:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:40,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:40,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:40,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:37:40,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:37:40,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 14:37:40,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:40,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:37:40,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:37:40,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:37:40,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:37:40,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309028922] [2020-10-13 14:37:40,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:37:40,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:37:40,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717139289] [2020-10-13 14:37:40,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:37:40,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:37:40,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:37:40,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:37:41,000 INFO L87 Difference]: Start difference. First operand 1588 states and 2070 transitions. Second operand 6 states. [2020-10-13 14:37:42,584 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 508 [2020-10-13 14:37:50,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:37:50,153 INFO L93 Difference]: Finished difference Result 3105 states and 4098 transitions. [2020-10-13 14:37:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:37:50,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 14:37:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:37:50,169 INFO L225 Difference]: With dead ends: 3105 [2020-10-13 14:37:50,170 INFO L226 Difference]: Without dead ends: 2024 [2020-10-13 14:37:50,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:37:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2020-10-13 14:37:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 2014. [2020-10-13 14:37:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2014 states. [2020-10-13 14:37:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 2641 transitions. [2020-10-13 14:37:50,304 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 2641 transitions. Word has length 57 [2020-10-13 14:37:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:37:50,305 INFO L479 AbstractCegarLoop]: Abstraction has 2014 states and 2641 transitions. [2020-10-13 14:37:50,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:37:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 2641 transitions. [2020-10-13 14:37:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:37:50,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:37:50,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:37:50,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:37:50,309 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:37:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:37:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1579807103, now seen corresponding path program 1 times [2020-10-13 14:37:50,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:37:50,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485870903] [2020-10-13 14:37:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:37:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:50,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:51,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:52,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:52,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:53,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:53,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:53,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:54,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:54,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:55,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:55,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:37:55,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:37:55,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:37:55,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:55,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:37:55,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:37:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:37:55,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:56,930 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:37:56,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:37:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:37:56,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:37:56,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:37:56,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:37:56,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:37:56,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 14:37:56,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:37:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:37:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:37:56,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:37:56,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:37:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:37:57,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485870903] [2020-10-13 14:37:57,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:37:57,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:37:57,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801339599] [2020-10-13 14:37:57,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:37:57,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:37:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:37:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:37:57,011 INFO L87 Difference]: Start difference. First operand 2014 states and 2641 transitions. Second operand 6 states. [2020-10-13 14:37:58,424 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-13 14:38:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:06,309 INFO L93 Difference]: Finished difference Result 5383 states and 7408 transitions. [2020-10-13 14:38:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:38:06,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 14:38:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:06,341 INFO L225 Difference]: With dead ends: 5383 [2020-10-13 14:38:06,342 INFO L226 Difference]: Without dead ends: 4438 [2020-10-13 14:38:06,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:38:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2020-10-13 14:38:06,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3331. [2020-10-13 14:38:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3331 states. [2020-10-13 14:38:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 4467 transitions. [2020-10-13 14:38:06,532 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 4467 transitions. Word has length 57 [2020-10-13 14:38:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:06,534 INFO L479 AbstractCegarLoop]: Abstraction has 3331 states and 4467 transitions. [2020-10-13 14:38:06,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:38:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 4467 transitions. [2020-10-13 14:38:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:38:06,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:06,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:38:06,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:38:06,546 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -477493960, now seen corresponding path program 1 times [2020-10-13 14:38:06,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:06,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315969558] [2020-10-13 14:38:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:06,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:07,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:07,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:08,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:08,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:08,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:09,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:09,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:11,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:11,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:38:11,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:38:11,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:38:11,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:11,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:38:11,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:38:11,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:38:11,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:13,279 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:38:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:13,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:13,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:13,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:13,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:38:13,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:13,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:13,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:38:13,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315969558] [2020-10-13 14:38:13,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:13,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 14:38:13,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121362875] [2020-10-13 14:38:13,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:38:13,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:38:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:38:13,348 INFO L87 Difference]: Start difference. First operand 3331 states and 4467 transitions. Second operand 10 states. [2020-10-13 14:38:15,020 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-13 14:38:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:21,863 INFO L93 Difference]: Finished difference Result 8423 states and 11766 transitions. [2020-10-13 14:38:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 14:38:21,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-13 14:38:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:21,891 INFO L225 Difference]: With dead ends: 8423 [2020-10-13 14:38:21,892 INFO L226 Difference]: Without dead ends: 5641 [2020-10-13 14:38:21,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-13 14:38:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2020-10-13 14:38:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 3924. [2020-10-13 14:38:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3924 states. [2020-10-13 14:38:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 5290 transitions. [2020-10-13 14:38:22,137 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 5290 transitions. Word has length 59 [2020-10-13 14:38:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:22,137 INFO L479 AbstractCegarLoop]: Abstraction has 3924 states and 5290 transitions. [2020-10-13 14:38:22,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:38:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 5290 transitions. [2020-10-13 14:38:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:38:22,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:22,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:38:22,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:38:22,144 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash 519506083, now seen corresponding path program 1 times [2020-10-13 14:38:22,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:22,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247403265] [2020-10-13 14:38:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:22,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:22,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:23,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:23,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:24,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:26,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:26,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:27,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:38:27,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:38:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 14:38:27,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:27,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:38:27,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:38:27,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:38:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:29,205 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:38:29,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:29,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:29,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:29,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:29,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:38:29,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:38:29,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247403265] [2020-10-13 14:38:29,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:29,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:38:29,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142616924] [2020-10-13 14:38:29,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:38:29,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:29,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:38:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:38:29,273 INFO L87 Difference]: Start difference. First operand 3924 states and 5290 transitions. Second operand 8 states. [2020-10-13 14:38:30,909 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 507 [2020-10-13 14:38:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:37,023 INFO L93 Difference]: Finished difference Result 8780 states and 12660 transitions. [2020-10-13 14:38:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:38:37,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-13 14:38:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:37,053 INFO L225 Difference]: With dead ends: 8780 [2020-10-13 14:38:37,054 INFO L226 Difference]: Without dead ends: 7226 [2020-10-13 14:38:37,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:38:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2020-10-13 14:38:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 3786. [2020-10-13 14:38:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3786 states. [2020-10-13 14:38:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 5110 transitions. [2020-10-13 14:38:37,344 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 5110 transitions. Word has length 59 [2020-10-13 14:38:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:37,345 INFO L479 AbstractCegarLoop]: Abstraction has 3786 states and 5110 transitions. [2020-10-13 14:38:37,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:38:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 5110 transitions. [2020-10-13 14:38:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:38:37,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:37,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:38:37,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:38:37,349 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1087890717, now seen corresponding path program 1 times [2020-10-13 14:38:37,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:37,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446455154] [2020-10-13 14:38:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:37,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:37,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:38,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:39,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:40,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:40,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:40,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:42,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:42,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:38:42,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:38:42,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:38:42,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:38:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:38:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:38:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:44,140 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:38:44,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:44,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:44,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:44,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:44,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:44,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:38:44,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:38:44,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446455154] [2020-10-13 14:38:44,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:44,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 14:38:44,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840904246] [2020-10-13 14:38:44,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:38:44,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:44,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:38:44,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:38:44,188 INFO L87 Difference]: Start difference. First operand 3786 states and 5110 transitions. Second operand 10 states. [2020-10-13 14:38:45,686 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-13 14:38:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:54,687 INFO L93 Difference]: Finished difference Result 7350 states and 10399 transitions. [2020-10-13 14:38:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:38:54,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-13 14:38:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:54,736 INFO L225 Difference]: With dead ends: 7350 [2020-10-13 14:38:54,737 INFO L226 Difference]: Without dead ends: 7346 [2020-10-13 14:38:54,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 14:38:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7346 states. [2020-10-13 14:38:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7346 to 3798. [2020-10-13 14:38:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3798 states. [2020-10-13 14:38:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5129 transitions. [2020-10-13 14:38:54,999 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5129 transitions. Word has length 59 [2020-10-13 14:38:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:55,000 INFO L479 AbstractCegarLoop]: Abstraction has 3798 states and 5129 transitions. [2020-10-13 14:38:55,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:38:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5129 transitions. [2020-10-13 14:38:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:38:55,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:55,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:38:55,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:38:55,007 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:55,008 INFO L82 PathProgramCache]: Analyzing trace with hash -847180308, now seen corresponding path program 1 times [2020-10-13 14:38:55,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:55,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623802019] [2020-10-13 14:38:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:55,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:56,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:57,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:58,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:58,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:38:58,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:38:58,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3645 [2020-10-13 14:38:58,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:38:58,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:38:58,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:38:58,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:00,552 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:39:00,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:00,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:00,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:00,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:00,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:39:00,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:00,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:00,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:00,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:39:00,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623802019] [2020-10-13 14:39:00,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:00,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:00,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424142477] [2020-10-13 14:39:00,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:00,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:00,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:00,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:00,612 INFO L87 Difference]: Start difference. First operand 3798 states and 5129 transitions. Second operand 4 states. [2020-10-13 14:39:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:05,099 INFO L93 Difference]: Finished difference Result 6136 states and 8630 transitions. [2020-10-13 14:39:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:39:05,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-13 14:39:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:05,107 INFO L225 Difference]: With dead ends: 6136 [2020-10-13 14:39:05,107 INFO L226 Difference]: Without dead ends: 4002 [2020-10-13 14:39:05,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2020-10-13 14:39:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 3271. [2020-10-13 14:39:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3271 states. [2020-10-13 14:39:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3271 states to 3271 states and 4437 transitions. [2020-10-13 14:39:05,362 INFO L78 Accepts]: Start accepts. Automaton has 3271 states and 4437 transitions. Word has length 60 [2020-10-13 14:39:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:05,364 INFO L479 AbstractCegarLoop]: Abstraction has 3271 states and 4437 transitions. [2020-10-13 14:39:05,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3271 states and 4437 transitions. [2020-10-13 14:39:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:39:05,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:05,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:39:05,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:39:05,369 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1515184943, now seen corresponding path program 1 times [2020-10-13 14:39:05,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:05,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157397554] [2020-10-13 14:39:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:05,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:05,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:06,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:06,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:06,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:07,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:08,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:10,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:10,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:39:10,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:39:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:39:10,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:39:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:39:10,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:11,843 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:39:11,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:11,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:11,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:11,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:11,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:11,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:39:11,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:11,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:11,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:39:11,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157397554] [2020-10-13 14:39:11,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:11,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:11,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612918683] [2020-10-13 14:39:11,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:11,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:11,887 INFO L87 Difference]: Start difference. First operand 3271 states and 4437 transitions. Second operand 4 states. [2020-10-13 14:39:13,320 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-13 14:39:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:16,409 INFO L93 Difference]: Finished difference Result 5967 states and 8443 transitions. [2020-10-13 14:39:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:16,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-13 14:39:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:16,416 INFO L225 Difference]: With dead ends: 5967 [2020-10-13 14:39:16,417 INFO L226 Difference]: Without dead ends: 3578 [2020-10-13 14:39:16,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3578 states. [2020-10-13 14:39:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3578 to 3576. [2020-10-13 14:39:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3576 states. [2020-10-13 14:39:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 5041 transitions. [2020-10-13 14:39:16,747 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 5041 transitions. Word has length 61 [2020-10-13 14:39:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:16,747 INFO L479 AbstractCegarLoop]: Abstraction has 3576 states and 5041 transitions. [2020-10-13 14:39:16,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 5041 transitions. [2020-10-13 14:39:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 14:39:16,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:16,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:39:16,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:39:16,750 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash -13406287, now seen corresponding path program 1 times [2020-10-13 14:39:16,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:16,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124759316] [2020-10-13 14:39:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:16,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:17,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:18,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:18,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:21,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:21,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:39:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:39:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:39:21,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:39:23,542 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:39:23,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:23,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:23,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:23,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:23,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:23,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 14:39:23,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:39:23,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124759316] [2020-10-13 14:39:23,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:23,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:39:23,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474783464] [2020-10-13 14:39:23,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:39:23,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:23,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:39:23,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:39:23,594 INFO L87 Difference]: Start difference. First operand 3576 states and 5041 transitions. Second operand 11 states. [2020-10-13 14:39:25,084 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-13 14:39:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:32,247 INFO L93 Difference]: Finished difference Result 9619 states and 13719 transitions. [2020-10-13 14:39:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 14:39:32,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-13 14:39:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:32,266 INFO L225 Difference]: With dead ends: 9619 [2020-10-13 14:39:32,267 INFO L226 Difference]: Without dead ends: 9615 [2020-10-13 14:39:32,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2020-10-13 14:39:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2020-10-13 14:39:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 3560. [2020-10-13 14:39:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3560 states. [2020-10-13 14:39:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 5018 transitions. [2020-10-13 14:39:32,634 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 5018 transitions. Word has length 62 [2020-10-13 14:39:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:32,634 INFO L479 AbstractCegarLoop]: Abstraction has 3560 states and 5018 transitions. [2020-10-13 14:39:32,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:39:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 5018 transitions. [2020-10-13 14:39:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:39:32,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:32,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:39:32,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:39:32,639 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:32,639 INFO L82 PathProgramCache]: Analyzing trace with hash -296276202, now seen corresponding path program 1 times [2020-10-13 14:39:32,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:32,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984757116] [2020-10-13 14:39:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:32,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:33,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:33,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:36,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:36,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:39:36,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:39:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3661 [2020-10-13 14:39:36,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 14:39:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:39:36,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:37,828 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:39:37,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:37,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:37,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:37,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:37,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:39:37,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:37,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:37,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:37,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:37,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:39:37,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984757116] [2020-10-13 14:39:37,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:37,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:37,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400532992] [2020-10-13 14:39:37,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:37,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:37,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:37,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:37,885 INFO L87 Difference]: Start difference. First operand 3560 states and 5018 transitions. Second operand 4 states. [2020-10-13 14:39:39,427 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 507 [2020-10-13 14:39:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:43,094 INFO L93 Difference]: Finished difference Result 8388 states and 12228 transitions. [2020-10-13 14:39:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:43,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:39:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:43,107 INFO L225 Difference]: With dead ends: 8388 [2020-10-13 14:39:43,107 INFO L226 Difference]: Without dead ends: 5854 [2020-10-13 14:39:43,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5854 states. [2020-10-13 14:39:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5854 to 5408. [2020-10-13 14:39:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5408 states. [2020-10-13 14:39:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 7722 transitions. [2020-10-13 14:39:43,580 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 7722 transitions. Word has length 70 [2020-10-13 14:39:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:43,580 INFO L479 AbstractCegarLoop]: Abstraction has 5408 states and 7722 transitions. [2020-10-13 14:39:43,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 7722 transitions. [2020-10-13 14:39:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:39:43,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:43,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:39:43,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:39:43,585 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash -43443291, now seen corresponding path program 1 times [2020-10-13 14:39:43,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:43,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831554790] [2020-10-13 14:39:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:43,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:43,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:43,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:45,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1988 [2020-10-13 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 14:39:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:39:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:47,059 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:39:47,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:47,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:47,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:47,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:47,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:39:47,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:47,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:47,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:39:47,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831554790] [2020-10-13 14:39:47,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:47,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:47,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023382374] [2020-10-13 14:39:47,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:47,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:47,106 INFO L87 Difference]: Start difference. First operand 5408 states and 7722 transitions. Second operand 4 states. [2020-10-13 14:39:48,588 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-13 14:39:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:52,220 INFO L93 Difference]: Finished difference Result 14008 states and 20416 transitions. [2020-10-13 14:39:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:52,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 14:39:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:52,233 INFO L225 Difference]: With dead ends: 14008 [2020-10-13 14:39:52,234 INFO L226 Difference]: Without dead ends: 9626 [2020-10-13 14:39:52,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9626 states. [2020-10-13 14:39:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9626 to 9624. [2020-10-13 14:39:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9624 states. [2020-10-13 14:39:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9624 states to 9624 states and 13794 transitions. [2020-10-13 14:39:53,121 INFO L78 Accepts]: Start accepts. Automaton has 9624 states and 13794 transitions. Word has length 71 [2020-10-13 14:39:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:53,121 INFO L479 AbstractCegarLoop]: Abstraction has 9624 states and 13794 transitions. [2020-10-13 14:39:53,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 9624 states and 13794 transitions. [2020-10-13 14:39:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:39:53,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:53,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:39:53,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:39:53,127 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:53,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1667623616, now seen corresponding path program 1 times [2020-10-13 14:39:53,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:53,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880701075] [2020-10-13 14:39:53,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:53,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:55,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:39:55,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:39:55,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1838 [2020-10-13 14:39:55,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:39:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 14:39:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 14:39:55,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:56,507 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:39:56,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:56,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:56,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:56,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:56,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:56,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:39:56,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:56,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:56,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:56,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:56,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:39:56,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880701075] [2020-10-13 14:39:56,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:56,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:39:56,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540477711] [2020-10-13 14:39:56,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:39:56,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:39:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:39:56,554 INFO L87 Difference]: Start difference. First operand 9624 states and 13794 transitions. Second operand 6 states. [2020-10-13 14:40:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:01,233 INFO L93 Difference]: Finished difference Result 17667 states and 25190 transitions. [2020-10-13 14:40:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:40:01,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-13 14:40:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:01,254 INFO L225 Difference]: With dead ends: 17667 [2020-10-13 14:40:01,254 INFO L226 Difference]: Without dead ends: 17665 [2020-10-13 14:40:01,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:40:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17665 states. [2020-10-13 14:40:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17665 to 9912. [2020-10-13 14:40:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9912 states. [2020-10-13 14:40:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9912 states to 9912 states and 14082 transitions. [2020-10-13 14:40:02,194 INFO L78 Accepts]: Start accepts. Automaton has 9912 states and 14082 transitions. Word has length 72 [2020-10-13 14:40:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:02,195 INFO L479 AbstractCegarLoop]: Abstraction has 9912 states and 14082 transitions. [2020-10-13 14:40:02,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:40:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9912 states and 14082 transitions. [2020-10-13 14:40:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:40:02,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:02,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:02,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:40:02,199 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:02,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:02,199 INFO L82 PathProgramCache]: Analyzing trace with hash -41704227, now seen corresponding path program 1 times [2020-10-13 14:40:02,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:02,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204333122] [2020-10-13 14:40:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:05,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:05,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:40:05,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:40:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3068 [2020-10-13 14:40:05,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 14:40:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:40:05,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:06,715 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:40:06,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:06,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:06,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:06,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:40:06,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:06,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:06,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204333122] [2020-10-13 14:40:06,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:06,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:06,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342278696] [2020-10-13 14:40:06,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:06,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:06,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:06,762 INFO L87 Difference]: Start difference. First operand 9912 states and 14082 transitions. Second operand 4 states. [2020-10-13 14:40:08,289 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-13 14:40:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:12,847 INFO L93 Difference]: Finished difference Result 26484 states and 37980 transitions. [2020-10-13 14:40:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:12,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 14:40:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:12,868 INFO L225 Difference]: With dead ends: 26484 [2020-10-13 14:40:12,869 INFO L226 Difference]: Without dead ends: 17626 [2020-10-13 14:40:12,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17626 states. [2020-10-13 14:40:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17626 to 17624. [2020-10-13 14:40:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17624 states. [2020-10-13 14:40:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17624 states to 17624 states and 25026 transitions. [2020-10-13 14:40:14,393 INFO L78 Accepts]: Start accepts. Automaton has 17624 states and 25026 transitions. Word has length 73 [2020-10-13 14:40:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:14,393 INFO L479 AbstractCegarLoop]: Abstraction has 17624 states and 25026 transitions. [2020-10-13 14:40:14,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17624 states and 25026 transitions. [2020-10-13 14:40:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 14:40:14,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:14,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:14,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:40:14,398 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash -592243068, now seen corresponding path program 1 times [2020-10-13 14:40:14,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:14,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533457656] [2020-10-13 14:40:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:14,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:18,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:19,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 14:40:19,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:40:19,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 14:40:19,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 14:40:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:40:19,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:20,905 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:40:20,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:20,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:20,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:40:20,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:20,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:20,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533457656] [2020-10-13 14:40:20,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:20,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:20,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716681546] [2020-10-13 14:40:20,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:20,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:20,954 INFO L87 Difference]: Start difference. First operand 17624 states and 25026 transitions. Second operand 4 states. [2020-10-13 14:40:22,446 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 507 [2020-10-13 14:40:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:28,905 INFO L93 Difference]: Finished difference Result 48834 states and 69162 transitions. [2020-10-13 14:40:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:28,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-13 14:40:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:28,946 INFO L225 Difference]: With dead ends: 48834 [2020-10-13 14:40:28,946 INFO L226 Difference]: Without dead ends: 32212 [2020-10-13 14:40:28,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32212 states. [2020-10-13 14:40:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32212 to 28754. [2020-10-13 14:40:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28754 states. [2020-10-13 14:40:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28754 states to 28754 states and 40158 transitions. [2020-10-13 14:40:33,035 INFO L78 Accepts]: Start accepts. Automaton has 28754 states and 40158 transitions. Word has length 75 [2020-10-13 14:40:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:33,036 INFO L479 AbstractCegarLoop]: Abstraction has 28754 states and 40158 transitions. [2020-10-13 14:40:33,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 28754 states and 40158 transitions. [2020-10-13 14:40:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:40:33,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:33,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:33,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:40:33,039 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:33,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1744965693, now seen corresponding path program 1 times [2020-10-13 14:40:33,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:33,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484458521] [2020-10-13 14:40:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:33,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:38,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:40:38,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:40:38,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:40:38,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:40:38,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:40:38,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:39,537 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-13 14:40:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:39,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:39,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:39,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484458521] [2020-10-13 14:40:39,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:39,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:39,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260207403] [2020-10-13 14:40:39,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:39,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:39,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:39,582 INFO L87 Difference]: Start difference. First operand 28754 states and 40158 transitions. Second operand 4 states. [2020-10-13 14:40:41,076 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 507