/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:29:32,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:29:32,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:29:32,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:29:32,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:29:32,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:29:32,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:29:32,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:29:32,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:29:32,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:29:32,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:29:32,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:29:32,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:29:32,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:29:32,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:29:32,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:29:32,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:29:32,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:29:32,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:29:32,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:29:32,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:29:32,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:29:32,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:29:32,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:29:32,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:29:32,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:29:32,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:29:32,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:29:32,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:29:32,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:29:32,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:29:32,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:29:32,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:29:32,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:29:32,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:29:32,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:29:32,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:29:32,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:29:32,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:29:32,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:29:32,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:29:32,984 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 [2020-10-14 09:29:33,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:29:33,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:29:33,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:29:33,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:29:33,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:29:33,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:29:33,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:29:33,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:29:33,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:29:33,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:29:33,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:29:33,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:29:33,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:29:33,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:29:33,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:29:33,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:29:33,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:29:33,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:29:33,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:29:33,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:29:33,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:29:33,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:29:33,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:29:33,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:29:33,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:29:33,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:29:33,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:29:33,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:29:33,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:29:33,033 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:29:33,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:29:33,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:29:33,382 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:29:33,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:29:33,384 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:29:33,385 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:29:33,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c131b625/dd05d1f5c32840bd93c4a21f9edf681e/FLAG7cfd8ea81 [2020-10-14 09:29:34,147 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:29:34,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:29:34,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c131b625/dd05d1f5c32840bd93c4a21f9edf681e/FLAG7cfd8ea81 [2020-10-14 09:29:34,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c131b625/dd05d1f5c32840bd93c4a21f9edf681e [2020-10-14 09:29:34,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:29:34,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:29:34,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:29:34,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:29:34,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:29:34,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:29:34" (1/1) ... [2020-10-14 09:29:34,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6f757b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:34, skipping insertion in model container [2020-10-14 09:29:34,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:29:34" (1/1) ... [2020-10-14 09:29:34,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:29:34,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:29:35,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:29:35,478 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:29:35,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:29:35,915 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:29:35,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35 WrapperNode [2020-10-14 09:29:35,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:29:35,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:29:35,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:29:35,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:29:35,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (1/1) ... [2020-10-14 09:29:35,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (1/1) ... [2020-10-14 09:29:35,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (1/1) ... [2020-10-14 09:29:35,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (1/1) ... [2020-10-14 09:29:36,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (1/1) ... [2020-10-14 09:29:36,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (1/1) ... [2020-10-14 09:29:36,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (1/1) ... [2020-10-14 09:29:36,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:29:36,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:29:36,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:29:36,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:29:36,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (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 [2020-10-14 09:29:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:29:36,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:29:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:29:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:29:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:29:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:29:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:29:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:29:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:29:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:29:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:29:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:29:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:29:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:29:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:29:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:29:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:29:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:29:36,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:29:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:29:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:29:38,849 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:29:38,849 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:29:38,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:29:38 BoogieIcfgContainer [2020-10-14 09:29:38,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:29:38,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:29:38,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:29:38,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:29:38,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:29:34" (1/3) ... [2020-10-14 09:29:38,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bb3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:29:38, skipping insertion in model container [2020-10-14 09:29:38,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:29:35" (2/3) ... [2020-10-14 09:29:38,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bb3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:29:38, skipping insertion in model container [2020-10-14 09:29:38,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:29:38" (3/3) ... [2020-10-14 09:29:38,869 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:29:38,879 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:29:38,889 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:29:38,904 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:29:38,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:29:38,933 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:29:38,933 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:29:38,933 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:29:38,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:29:38,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:29:38,934 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:29:38,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:29:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states. [2020-10-14 09:29:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-14 09:29:38,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:29:38,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:29:38,998 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:29:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:29:39,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1427429186, now seen corresponding path program 1 times [2020-10-14 09:29:39,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:29:39,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951395265] [2020-10-14 09:29:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:29:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:40,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:42,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:42,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:42,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:44,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:44,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:45,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:45,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-14 09:29:45,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:29:45,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-14 09:29:45,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:45,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:29:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:29:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-14 09:29:45,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:29:45,917 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:29:45,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:29:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:45,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:45,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:29:45,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:29:45,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 09:29:45,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:45,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:29:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:29:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:29:45,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:29:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:29:46,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951395265] [2020-10-14 09:29:46,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:29:46,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:29:46,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781177514] [2020-10-14 09:29:46,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:29:46,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:29:46,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:29:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:29:46,200 INFO L87 Difference]: Start difference. First operand 783 states. Second operand 5 states. [2020-10-14 09:29:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:29:53,841 INFO L93 Difference]: Finished difference Result 2298 states and 4077 transitions. [2020-10-14 09:29:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:29:53,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 312 [2020-10-14 09:29:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:29:53,872 INFO L225 Difference]: With dead ends: 2298 [2020-10-14 09:29:53,873 INFO L226 Difference]: Without dead ends: 1520 [2020-10-14 09:29:53,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:29:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2020-10-14 09:29:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1518. [2020-10-14 09:29:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-10-14 09:29:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2375 transitions. [2020-10-14 09:29:54,028 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2375 transitions. Word has length 312 [2020-10-14 09:29:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:29:54,029 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2375 transitions. [2020-10-14 09:29:54,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:29:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2375 transitions. [2020-10-14 09:29:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-14 09:29:54,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:29:54,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:29:54,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:29:54,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:29:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:29:54,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1166681666, now seen corresponding path program 1 times [2020-10-14 09:29:54,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:29:54,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967308593] [2020-10-14 09:29:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:29:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:54,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:54,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:54,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:55,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:56,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:56,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:56,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:59,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:59,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-14 09:29:59,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:29:59,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 09:29:59,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:59,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:29:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:29:59,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 09:29:59,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:29:59,854 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:29:59,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:29:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:59,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:59,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:59,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:29:59,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:29:59,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:29:59,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:59,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:59,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:29:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:29:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:29:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:30:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:30:00,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967308593] [2020-10-14 09:30:00,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:30:00,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:30:00,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591688167] [2020-10-14 09:30:00,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:30:00,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:30:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:30:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:00,171 INFO L87 Difference]: Start difference. First operand 1518 states and 2375 transitions. Second operand 4 states. [2020-10-14 09:30:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:30:09,352 INFO L93 Difference]: Finished difference Result 4340 states and 6756 transitions. [2020-10-14 09:30:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:30:09,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 314 [2020-10-14 09:30:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:30:09,370 INFO L225 Difference]: With dead ends: 4340 [2020-10-14 09:30:09,370 INFO L226 Difference]: Without dead ends: 2962 [2020-10-14 09:30:09,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-10-14 09:30:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2960. [2020-10-14 09:30:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2960 states. [2020-10-14 09:30:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 4606 transitions. [2020-10-14 09:30:09,521 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 4606 transitions. Word has length 314 [2020-10-14 09:30:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:30:09,525 INFO L479 AbstractCegarLoop]: Abstraction has 2960 states and 4606 transitions. [2020-10-14 09:30:09,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:30:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 4606 transitions. [2020-10-14 09:30:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-14 09:30:09,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:30:09,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:30:09,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:30:09,540 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:30:09,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:30:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash 381865607, now seen corresponding path program 1 times [2020-10-14 09:30:09,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:30:09,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388022321] [2020-10-14 09:30:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:30:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:09,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:09,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:10,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:10,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:10,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:10,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:10,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:10,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:10,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:11,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:11,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:11,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:12,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:14,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:14,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-14 09:30:14,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:30:14,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 09:30:14,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:14,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:30:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:30:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:30:14,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:30:15,162 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:30:15,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:30:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:15,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:15,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:15,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:30:15,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:30:15,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 09:30:15,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:15,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:15,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:30:15,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:30:15,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:30:15,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:30:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:30:15,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388022321] [2020-10-14 09:30:15,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:30:15,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:30:15,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450041250] [2020-10-14 09:30:15,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:30:15,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:30:15,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:30:15,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:15,334 INFO L87 Difference]: Start difference. First operand 2960 states and 4606 transitions. Second operand 4 states. [2020-10-14 09:30:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:30:19,909 INFO L93 Difference]: Finished difference Result 8721 states and 13542 transitions. [2020-10-14 09:30:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:30:19,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 314 [2020-10-14 09:30:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:30:19,938 INFO L225 Difference]: With dead ends: 8721 [2020-10-14 09:30:19,938 INFO L226 Difference]: Without dead ends: 5788 [2020-10-14 09:30:19,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2020-10-14 09:30:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 2971. [2020-10-14 09:30:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2971 states. [2020-10-14 09:30:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4621 transitions. [2020-10-14 09:30:20,100 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4621 transitions. Word has length 314 [2020-10-14 09:30:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:30:20,102 INFO L479 AbstractCegarLoop]: Abstraction has 2971 states and 4621 transitions. [2020-10-14 09:30:20,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:30:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4621 transitions. [2020-10-14 09:30:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-14 09:30:20,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:30:20,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:30:20,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:30:20,112 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:30:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:30:20,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2126242153, now seen corresponding path program 1 times [2020-10-14 09:30:20,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:30:20,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048554387] [2020-10-14 09:30:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:30:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:20,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:20,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:21,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:22,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:22,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:22,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:23,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:23,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:23,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:25,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:25,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-14 09:30:25,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:30:25,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 09:30:25,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:25,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:25,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:30:25,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:30:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:30:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:30:25,688 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:30:25,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:30:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:25,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:25,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:25,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:30:25,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:30:25,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 09:30:25,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:25,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:30:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:30:25,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:30:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:30:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:30:25,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048554387] [2020-10-14 09:30:25,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:30:25,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:30:25,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342618327] [2020-10-14 09:30:25,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:30:25,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:30:25,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:30:25,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:25,795 INFO L87 Difference]: Start difference. First operand 2971 states and 4621 transitions. Second operand 4 states. [2020-10-14 09:30:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:30:33,728 INFO L93 Difference]: Finished difference Result 8818 states and 13709 transitions. [2020-10-14 09:30:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:30:33,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-14 09:30:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:30:33,754 INFO L225 Difference]: With dead ends: 8818 [2020-10-14 09:30:33,754 INFO L226 Difference]: Without dead ends: 5897 [2020-10-14 09:30:33,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2020-10-14 09:30:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 2987. [2020-10-14 09:30:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2987 states. [2020-10-14 09:30:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 4640 transitions. [2020-10-14 09:30:33,915 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 4640 transitions. Word has length 315 [2020-10-14 09:30:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:30:33,915 INFO L479 AbstractCegarLoop]: Abstraction has 2987 states and 4640 transitions. [2020-10-14 09:30:33,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:30:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 4640 transitions. [2020-10-14 09:30:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-14 09:30:33,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:30:33,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:30:33,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:30:33,935 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:30:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:30:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1718264701, now seen corresponding path program 1 times [2020-10-14 09:30:33,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:30:33,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466033343] [2020-10-14 09:30:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:30:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:34,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:34,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:35,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:39,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:39,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-14 09:30:39,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:30:39,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-14 09:30:39,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:39,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:39,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:30:39,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 09:30:39,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-14 09:30:39,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:30:39,813 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:30:39,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:30:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:39,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:39,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:30:39,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:30:39,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 09:30:39,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:39,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:30:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:30:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:30:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:30:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:30:40,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466033343] [2020-10-14 09:30:40,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:30:40,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:30:40,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801431063] [2020-10-14 09:30:40,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:30:40,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:30:40,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:30:40,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:40,065 INFO L87 Difference]: Start difference. First operand 2987 states and 4640 transitions. Second operand 4 states. [2020-10-14 09:30:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:30:47,813 INFO L93 Difference]: Finished difference Result 8588 states and 13301 transitions. [2020-10-14 09:30:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:30:47,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 316 [2020-10-14 09:30:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:30:47,835 INFO L225 Difference]: With dead ends: 8588 [2020-10-14 09:30:47,835 INFO L226 Difference]: Without dead ends: 5798 [2020-10-14 09:30:47,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:30:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-10-14 09:30:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5796. [2020-10-14 09:30:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5796 states. [2020-10-14 09:30:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 8952 transitions. [2020-10-14 09:30:48,163 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 8952 transitions. Word has length 316 [2020-10-14 09:30:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:30:48,164 INFO L479 AbstractCegarLoop]: Abstraction has 5796 states and 8952 transitions. [2020-10-14 09:30:48,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:30:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 8952 transitions. [2020-10-14 09:30:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-14 09:30:48,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:30:48,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:30:48,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:30:48,176 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:30:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:30:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1650256154, now seen corresponding path program 1 times [2020-10-14 09:30:48,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:30:48,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294587849] [2020-10-14 09:30:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:30:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:48,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:48,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:48,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:48,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:49,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:50,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:53,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:53,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-14 09:30:53,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:30:53,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:30:53,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:53,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:30:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:30:53,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-14 09:30:53,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:30:53,870 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:30:53,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:30:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:30:53,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:30:53,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:30:53,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:30:53,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:30:53,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:30:53,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:30:53,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:30:53,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:30:53,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:30:53,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:30:53,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:30:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:30:54,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294587849] [2020-10-14 09:30:54,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:30:54,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:30:54,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269689063] [2020-10-14 09:30:54,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:30:54,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:30:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:30:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:30:54,059 INFO L87 Difference]: Start difference. First operand 5796 states and 8952 transitions. Second operand 5 states. [2020-10-14 09:31:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:31:00,626 INFO L93 Difference]: Finished difference Result 17018 states and 26256 transitions. [2020-10-14 09:31:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:31:00,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 316 [2020-10-14 09:31:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:31:00,665 INFO L225 Difference]: With dead ends: 17018 [2020-10-14 09:31:00,665 INFO L226 Difference]: Without dead ends: 11275 [2020-10-14 09:31:00,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:31:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2020-10-14 09:31:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11267. [2020-10-14 09:31:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11267 states. [2020-10-14 09:31:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 17271 transitions. [2020-10-14 09:31:01,050 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 17271 transitions. Word has length 316 [2020-10-14 09:31:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:31:01,051 INFO L479 AbstractCegarLoop]: Abstraction has 11267 states and 17271 transitions. [2020-10-14 09:31:01,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:31:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 17271 transitions. [2020-10-14 09:31:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-14 09:31:01,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:31:01,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:31:01,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:31:01,075 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:31:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:31:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash 627312084, now seen corresponding path program 1 times [2020-10-14 09:31:01,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:31:01,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27913046] [2020-10-14 09:31:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:31:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:01,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:01,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:01,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:01,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:01,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:02,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:02,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:02,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:02,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:02,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:03,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:06,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:06,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-14 09:31:06,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:31:06,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 09:31:06,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:06,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:31:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:31:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 09:31:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:31:06,646 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:31:06,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:31:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:06,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:06,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:31:06,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:31:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:31:06,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:06,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:31:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:31:06,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:31:06,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:31:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:31:06,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27913046] [2020-10-14 09:31:06,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:31:06,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:31:06,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185354023] [2020-10-14 09:31:06,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:31:06,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:31:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:31:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:31:06,765 INFO L87 Difference]: Start difference. First operand 11267 states and 17271 transitions. Second operand 4 states. [2020-10-14 09:31:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:31:15,125 INFO L93 Difference]: Finished difference Result 32621 states and 49808 transitions. [2020-10-14 09:31:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:31:15,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-14 09:31:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:31:15,167 INFO L225 Difference]: With dead ends: 32621 [2020-10-14 09:31:15,167 INFO L226 Difference]: Without dead ends: 21935 [2020-10-14 09:31:15,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:31:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21935 states. [2020-10-14 09:31:16,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21935 to 21933. [2020-10-14 09:31:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21933 states. [2020-10-14 09:31:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21933 states to 21933 states and 33374 transitions. [2020-10-14 09:31:16,096 INFO L78 Accepts]: Start accepts. Automaton has 21933 states and 33374 transitions. Word has length 317 [2020-10-14 09:31:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:31:16,097 INFO L479 AbstractCegarLoop]: Abstraction has 21933 states and 33374 transitions. [2020-10-14 09:31:16,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:31:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 21933 states and 33374 transitions. [2020-10-14 09:31:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-14 09:31:16,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:31:16,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:31:16,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:31:16,135 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:31:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:31:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1124010577, now seen corresponding path program 1 times [2020-10-14 09:31:16,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:31:16,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283128852] [2020-10-14 09:31:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:31:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:16,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:16,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:16,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:16,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:17,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:17,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:18,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:18,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:18,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:18,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:20,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:21,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:21,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-14 09:31:21,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:31:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:31:21,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:21,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:31:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:31:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-14 09:31:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:31:21,764 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:31:21,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:31:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:21,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:21,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:21,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:31:21,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:31:21,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:31:21,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:21,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:31:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:31:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:31:21,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:31:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:31:21,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283128852] [2020-10-14 09:31:21,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:31:21,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:31:21,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045312625] [2020-10-14 09:31:21,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:31:21,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:31:21,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:31:21,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:31:21,927 INFO L87 Difference]: Start difference. First operand 21933 states and 33374 transitions. Second operand 5 states. [2020-10-14 09:31:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:31:28,948 INFO L93 Difference]: Finished difference Result 46031 states and 70046 transitions. [2020-10-14 09:31:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:31:28,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2020-10-14 09:31:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:31:29,000 INFO L225 Difference]: With dead ends: 46031 [2020-10-14 09:31:29,000 INFO L226 Difference]: Without dead ends: 24297 [2020-10-14 09:31:29,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:31:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24297 states. [2020-10-14 09:31:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24297 to 21664. [2020-10-14 09:31:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21664 states. [2020-10-14 09:31:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21664 states to 21664 states and 32856 transitions. [2020-10-14 09:31:29,905 INFO L78 Accepts]: Start accepts. Automaton has 21664 states and 32856 transitions. Word has length 318 [2020-10-14 09:31:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:31:29,906 INFO L479 AbstractCegarLoop]: Abstraction has 21664 states and 32856 transitions. [2020-10-14 09:31:29,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:31:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 21664 states and 32856 transitions. [2020-10-14 09:31:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-14 09:31:30,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:31:30,033 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:31:30,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:31:30,034 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:31:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:31:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1649194038, now seen corresponding path program 1 times [2020-10-14 09:31:30,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:31:30,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456657560] [2020-10-14 09:31:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:31:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:30,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:30,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:30,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:30,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:30,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:31,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:32,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:32,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:35,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:35,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 09:31:35,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:31:35,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 09:31:35,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:35,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:31:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 09:31:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:31:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:31:35,574 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:31:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:31:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:35,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:35,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:31:35,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:31:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:31:35,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:35,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:31:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:31:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:31:35,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:31:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:31:35,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456657560] [2020-10-14 09:31:35,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:31:35,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:31:35,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65434370] [2020-10-14 09:31:35,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:31:35,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:31:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:31:35,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:31:35,716 INFO L87 Difference]: Start difference. First operand 21664 states and 32856 transitions. Second operand 4 states. [2020-10-14 09:31:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:31:41,466 INFO L93 Difference]: Finished difference Result 64375 states and 97555 transitions. [2020-10-14 09:31:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:31:41,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-10-14 09:31:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:31:41,535 INFO L225 Difference]: With dead ends: 64375 [2020-10-14 09:31:41,535 INFO L226 Difference]: Without dead ends: 42942 [2020-10-14 09:31:41,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:31:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42942 states. [2020-10-14 09:31:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42942 to 21722. [2020-10-14 09:31:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21722 states. [2020-10-14 09:31:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21722 states to 21722 states and 32932 transitions. [2020-10-14 09:31:42,738 INFO L78 Accepts]: Start accepts. Automaton has 21722 states and 32932 transitions. Word has length 320 [2020-10-14 09:31:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:31:42,738 INFO L479 AbstractCegarLoop]: Abstraction has 21722 states and 32932 transitions. [2020-10-14 09:31:42,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:31:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 21722 states and 32932 transitions. [2020-10-14 09:31:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-14 09:31:42,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:31:42,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:31:42,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:31:42,758 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:31:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:31:42,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1355981268, now seen corresponding path program 1 times [2020-10-14 09:31:42,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:31:42,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715989552] [2020-10-14 09:31:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:31:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:42,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:43,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:43,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:43,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:47,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:47,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-14 09:31:47,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:31:47,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-14 09:31:47,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:47,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:31:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 09:31:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:31:47,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:31:48,327 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:31:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:31:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:48,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:48,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:31:48,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:31:48,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:31:48,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:31:48,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:31:48,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:31:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:31:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:31:48,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:31:48,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:31:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:31:48,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715989552] [2020-10-14 09:31:48,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:31:48,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:31:48,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215698022] [2020-10-14 09:31:48,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:31:48,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:31:48,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:31:48,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:31:48,405 INFO L87 Difference]: Start difference. First operand 21722 states and 32932 transitions. Second operand 4 states. [2020-10-14 09:31:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:31:54,607 INFO L93 Difference]: Finished difference Result 64368 states and 97494 transitions. [2020-10-14 09:31:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:31:54,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-10-14 09:31:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:31:54,654 INFO L225 Difference]: With dead ends: 64368 [2020-10-14 09:31:54,654 INFO L226 Difference]: Without dead ends: 42845 [2020-10-14 09:31:54,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:31:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42845 states. [2020-10-14 09:31:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42845 to 21821. [2020-10-14 09:31:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21821 states. [2020-10-14 09:31:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21821 states to 21821 states and 33071 transitions. [2020-10-14 09:31:55,737 INFO L78 Accepts]: Start accepts. Automaton has 21821 states and 33071 transitions. Word has length 321 [2020-10-14 09:31:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:31:55,737 INFO L479 AbstractCegarLoop]: Abstraction has 21821 states and 33071 transitions. [2020-10-14 09:31:55,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:31:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 21821 states and 33071 transitions. [2020-10-14 09:31:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-14 09:31:55,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:31:55,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:31:55,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:31:55,755 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:31:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:31:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1269251840, now seen corresponding path program 1 times [2020-10-14 09:31:55,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:31:55,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510744954] [2020-10-14 09:31:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:31:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:31:55,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:55,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:31:57,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:00,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:00,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-14 09:32:00,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 09:32:00,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 09:32:00,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:00,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:32:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:32:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-14 09:32:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:01,355 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:32:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:32:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:32:01,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:01,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:01,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:32:01,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:32:01,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:32:01,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:01,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:32:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:32:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:32:01,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:32:01,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510744954] [2020-10-14 09:32:01,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:32:01,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:32:01,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368073492] [2020-10-14 09:32:01,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:32:01,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:32:01,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:32:01,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:32:01,508 INFO L87 Difference]: Start difference. First operand 21821 states and 33071 transitions. Second operand 4 states. [2020-10-14 09:32:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:32:11,602 INFO L93 Difference]: Finished difference Result 62369 states and 94052 transitions. [2020-10-14 09:32:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:32:11,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-14 09:32:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:32:11,641 INFO L225 Difference]: With dead ends: 62369 [2020-10-14 09:32:11,641 INFO L226 Difference]: Without dead ends: 42175 [2020-10-14 09:32:11,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:32:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42175 states. [2020-10-14 09:32:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42175 to 42173. [2020-10-14 09:32:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42173 states. [2020-10-14 09:32:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42173 states to 42173 states and 63408 transitions. [2020-10-14 09:32:13,329 INFO L78 Accepts]: Start accepts. Automaton has 42173 states and 63408 transitions. Word has length 322 [2020-10-14 09:32:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:32:13,329 INFO L479 AbstractCegarLoop]: Abstraction has 42173 states and 63408 transitions. [2020-10-14 09:32:13,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:32:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 42173 states and 63408 transitions. [2020-10-14 09:32:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-14 09:32:13,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:32:13,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:32:13,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:32:13,371 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:32:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:32:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1889858461, now seen corresponding path program 1 times [2020-10-14 09:32:13,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:32:13,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176435943] [2020-10-14 09:32:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:32:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:32:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:13,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:13,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:14,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:15,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:15,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:15,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:15,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:15,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:16,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:16,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:16,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:17,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:17,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:17,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:19,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5544 [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:32:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 09:32:19,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:19,525 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:32:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:32:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:32:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:19,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:19,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:32:19,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:32:19,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:32:19,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:19,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:19,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:32:19,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:32:19,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:32:19,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:32:19,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176435943] [2020-10-14 09:32:19,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:32:19,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:32:19,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256576565] [2020-10-14 09:32:19,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:32:19,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:32:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:32:19,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:32:19,654 INFO L87 Difference]: Start difference. First operand 42173 states and 63408 transitions. Second operand 5 states. [2020-10-14 09:32:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:32:28,434 INFO L93 Difference]: Finished difference Result 88305 states and 132508 transitions. [2020-10-14 09:32:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:32:28,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-10-14 09:32:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:32:28,478 INFO L225 Difference]: With dead ends: 88305 [2020-10-14 09:32:28,479 INFO L226 Difference]: Without dead ends: 47859 [2020-10-14 09:32:28,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:32:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47859 states. [2020-10-14 09:32:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47859 to 42321. [2020-10-14 09:32:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42321 states. [2020-10-14 09:32:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42321 states to 42321 states and 63568 transitions. [2020-10-14 09:32:30,530 INFO L78 Accepts]: Start accepts. Automaton has 42321 states and 63568 transitions. Word has length 322 [2020-10-14 09:32:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:32:30,531 INFO L479 AbstractCegarLoop]: Abstraction has 42321 states and 63568 transitions. [2020-10-14 09:32:30,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:32:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 42321 states and 63568 transitions. [2020-10-14 09:32:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-14 09:32:30,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:32:30,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:32:30,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:32:30,559 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:32:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:32:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash 754565124, now seen corresponding path program 1 times [2020-10-14 09:32:30,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:32:30,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639280136] [2020-10-14 09:32:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:32:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:32:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:30,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:30,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:30,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:30,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:30,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:35,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:35,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 09:32:35,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:32:35,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 09:32:35,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:35,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:35,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:32:35,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 09:32:35,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:32:35,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:36,116 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:32:36,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:32:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:32:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:36,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:32:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:32:36,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:32:36,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639280136] [2020-10-14 09:32:36,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:32:36,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:32:36,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398714198] [2020-10-14 09:32:36,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:32:36,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:32:36,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:32:36,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:32:36,191 INFO L87 Difference]: Start difference. First operand 42321 states and 63568 transitions. Second operand 4 states. [2020-10-14 09:32:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:32:44,774 INFO L93 Difference]: Finished difference Result 123477 states and 184842 transitions. [2020-10-14 09:32:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:32:44,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-10-14 09:32:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:32:44,849 INFO L225 Difference]: With dead ends: 123477 [2020-10-14 09:32:44,849 INFO L226 Difference]: Without dead ends: 82947 [2020-10-14 09:32:44,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:32:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82947 states. [2020-10-14 09:32:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82947 to 42593. [2020-10-14 09:32:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42593 states. [2020-10-14 09:32:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42593 states to 42593 states and 63952 transitions. [2020-10-14 09:32:48,748 INFO L78 Accepts]: Start accepts. Automaton has 42593 states and 63952 transitions. Word has length 324 [2020-10-14 09:32:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:32:48,748 INFO L479 AbstractCegarLoop]: Abstraction has 42593 states and 63952 transitions. [2020-10-14 09:32:48,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:32:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 42593 states and 63952 transitions. [2020-10-14 09:32:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-14 09:32:48,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:32:48,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:32:48,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:32:48,778 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:32:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:32:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1430953370, now seen corresponding path program 1 times [2020-10-14 09:32:48,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:32:48,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413705655] [2020-10-14 09:32:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:32:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:32:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:48,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:49,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:51,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:51,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:51,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:52,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:52,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:52,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:53,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 09:32:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:32:53,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:54,338 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:32:54,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:32:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:32:54,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:32:54,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:32:54,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:32:54,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:32:54,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:32:54,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:32:54,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:32:54,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:32:54,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:32:54,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:32:54,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:32:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:32:54,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413705655] [2020-10-14 09:32:54,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:32:54,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:32:54,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472010701] [2020-10-14 09:32:54,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:32:54,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:32:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:32:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:32:54,414 INFO L87 Difference]: Start difference. First operand 42593 states and 63952 transitions. Second operand 4 states. [2020-10-14 09:33:03,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:33:03,338 INFO L93 Difference]: Finished difference Result 124117 states and 185810 transitions. [2020-10-14 09:33:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:33:03,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-14 09:33:03,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:33:03,420 INFO L225 Difference]: With dead ends: 124117 [2020-10-14 09:33:03,421 INFO L226 Difference]: Without dead ends: 83315 [2020-10-14 09:33:03,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:33:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83315 states. [2020-10-14 09:33:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83315 to 42993. [2020-10-14 09:33:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42993 states. [2020-10-14 09:33:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42993 states to 42993 states and 64512 transitions. [2020-10-14 09:33:06,115 INFO L78 Accepts]: Start accepts. Automaton has 42993 states and 64512 transitions. Word has length 325 [2020-10-14 09:33:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:33:06,115 INFO L479 AbstractCegarLoop]: Abstraction has 42993 states and 64512 transitions. [2020-10-14 09:33:06,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:33:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 42993 states and 64512 transitions. [2020-10-14 09:33:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-14 09:33:06,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:33:06,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:33:06,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:33:06,146 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:33:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:33:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1372328873, now seen corresponding path program 1 times [2020-10-14 09:33:06,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:33:06,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570104939] [2020-10-14 09:33:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:33:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:06,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:11,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:11,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-14 09:33:11,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:33:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:33:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:11,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:33:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:33:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 09:33:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:33:11,823 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:33:11,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:33:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:11,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:11,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:11,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:33:11,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:33:11,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:33:11,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:11,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:11,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:33:11,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:33:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:33:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:33:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:33:11,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570104939] [2020-10-14 09:33:11,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:33:11,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:33:11,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215138840] [2020-10-14 09:33:11,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:33:11,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:33:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:33:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:33:11,967 INFO L87 Difference]: Start difference. First operand 42993 states and 64512 transitions. Second operand 5 states.