/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:28:55,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:28:55,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:28:55,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:28:55,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:28:55,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:28:55,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:28:55,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:28:55,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:28:55,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:28:55,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:28:55,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:28:55,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:28:55,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:28:55,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:28:55,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:28:55,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:28:55,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:28:55,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:28:55,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:28:55,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:28:55,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:28:55,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:28:55,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:28:55,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:28:55,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:28:55,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:28:55,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:28:55,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:28:55,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:28:55,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:28:55,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:28:55,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:28:55,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:28:55,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:28:55,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:28:55,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:28:55,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:28:55,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:28:56,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:28:56,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:28:56,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:28:56,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:28:56,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:28:56,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:28:56,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:28:56,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:28:56,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:28:56,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:28:56,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:28:56,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:28:56,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:28:56,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:28:56,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:28:56,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:28:56,027 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:28:56,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:28:56,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:28:56,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:28:56,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:28:56,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:28:56,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:28:56,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:28:56,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:28:56,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:28:56,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:28:56,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:28:56,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:28:56,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:28:56,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:28:56,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:28:56,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:28:56,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:28:56,379 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:28:56,382 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:28:56,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:28:56,384 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:28:56,385 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-12 20:28:56,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b36d3a56/455e22fcc2494f59a2d74d5e13a4ca37/FLAG6a200bfc5 [2020-10-12 20:28:57,171 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:28:57,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-12 20:28:57,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b36d3a56/455e22fcc2494f59a2d74d5e13a4ca37/FLAG6a200bfc5 [2020-10-12 20:28:57,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b36d3a56/455e22fcc2494f59a2d74d5e13a4ca37 [2020-10-12 20:28:57,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:28:57,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:28:57,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:28:57,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:28:57,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:28:57,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:28:57" (1/1) ... [2020-10-12 20:28:57,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f14d527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:28:57, skipping insertion in model container [2020-10-12 20:28:57,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:28:57" (1/1) ... [2020-10-12 20:28:57,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:28:57,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:28:59,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:28:59,025 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:29:00,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:29:00,668 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:29:00,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00 WrapperNode [2020-10-12 20:29:00,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:29:00,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:29:00,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:29:00,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:29:00,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... [2020-10-12 20:29:00,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... [2020-10-12 20:29:00,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... [2020-10-12 20:29:00,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... [2020-10-12 20:29:00,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... [2020-10-12 20:29:00,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... [2020-10-12 20:29:00,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... [2020-10-12 20:29:00,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:29:00,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:29:00,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:29:00,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:29:00,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:29:00,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:29:00,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:29:00,987 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:29:00,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:29:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:29:00,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:29:00,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:29:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:29:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:29:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:29:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:29:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:29:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:29:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:29:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:29:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:29:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 20:29:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:29:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:29:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:29:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:29:00,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:29:05,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:29:05,050 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:29:05,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:29:05 BoogieIcfgContainer [2020-10-12 20:29:05,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:29:05,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:29:05,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:29:05,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:29:05,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:28:57" (1/3) ... [2020-10-12 20:29:05,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7c6ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:29:05, skipping insertion in model container [2020-10-12 20:29:05,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:29:00" (2/3) ... [2020-10-12 20:29:05,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7c6ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:29:05, skipping insertion in model container [2020-10-12 20:29:05,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:29:05" (3/3) ... [2020-10-12 20:29:05,069 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-12 20:29:05,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:29:05,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:29:05,104 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:29:05,134 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:29:05,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:29:05,135 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:29:05,135 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:29:05,135 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:29:05,135 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:29:05,135 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:29:05,136 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:29:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-10-12 20:29:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-12 20:29:05,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:29:05,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:29:05,228 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:29:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:29:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-10-12 20:29:05,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:29:05,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625033770] [2020-10-12 20:29:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:29:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:29:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:09,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:10,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:11,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:12,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:12,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:29:12,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 493 [2020-10-12 20:29:12,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:29:12,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-12 20:29:12,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:29:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:29:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:29:12,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 246 [2020-10-12 20:29:12,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:29:14,611 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 403 [2020-10-12 20:29:14,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:29:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:29:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:14,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:29:14,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:29:14,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:29:14,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 20:29:14,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:29:14,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:29:14,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:29:14,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:29:14,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:29:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:29:15,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625033770] [2020-10-12 20:29:15,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:29:15,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:29:15,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933648186] [2020-10-12 20:29:15,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:29:15,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:29:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:29:15,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:29:15,317 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2020-10-12 20:29:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:29:34,242 INFO L93 Difference]: Finished difference Result 4172 states and 7512 transitions. [2020-10-12 20:29:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:29:34,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-10-12 20:29:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:29:34,332 INFO L225 Difference]: With dead ends: 4172 [2020-10-12 20:29:34,332 INFO L226 Difference]: Without dead ends: 2814 [2020-10-12 20:29:34,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:29:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-10-12 20:29:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-10-12 20:29:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-10-12 20:29:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4642 transitions. [2020-10-12 20:29:34,720 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4642 transitions. Word has length 487 [2020-10-12 20:29:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:29:34,727 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4642 transitions. [2020-10-12 20:29:34,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:29:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4642 transitions. [2020-10-12 20:29:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-12 20:29:34,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:29:34,746 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:29:34,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:29:34,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:29:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:29:34,749 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-10-12 20:29:34,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:29:34,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984977650] [2020-10-12 20:29:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:29:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:29:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:37,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:37,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:38,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:38,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:38,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:39,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:39,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:40,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:40,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:29:40,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 495 [2020-10-12 20:29:40,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 20:29:40,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5219 [2020-10-12 20:29:40,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:29:40,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:29:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:29:40,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-12 20:29:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:29:41,939 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 403 [2020-10-12 20:29:41,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:29:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:29:41,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:29:41,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:29:41,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:29:41,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:29:41,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 20:29:41,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:29:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:29:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:29:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:29:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:29:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:29:42,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984977650] [2020-10-12 20:29:42,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:29:42,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:29:42,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113364903] [2020-10-12 20:29:42,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:29:42,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:29:42,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:29:42,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:29:42,896 INFO L87 Difference]: Start difference. First operand 2812 states and 4642 transitions. Second operand 5 states. [2020-10-12 20:29:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:29:59,034 INFO L93 Difference]: Finished difference Result 8237 states and 13571 transitions. [2020-10-12 20:29:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:29:59,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 489 [2020-10-12 20:29:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:29:59,068 INFO L225 Difference]: With dead ends: 8237 [2020-10-12 20:29:59,068 INFO L226 Difference]: Without dead ends: 5503 [2020-10-12 20:29:59,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:29:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5503 states. [2020-10-12 20:29:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5503 to 5501. [2020-10-12 20:29:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5501 states. [2020-10-12 20:29:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5501 states to 5501 states and 9030 transitions. [2020-10-12 20:29:59,348 INFO L78 Accepts]: Start accepts. Automaton has 5501 states and 9030 transitions. Word has length 489 [2020-10-12 20:29:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:29:59,353 INFO L479 AbstractCegarLoop]: Abstraction has 5501 states and 9030 transitions. [2020-10-12 20:29:59,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:29:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5501 states and 9030 transitions. [2020-10-12 20:29:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-12 20:29:59,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:29:59,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:29:59,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:29:59,378 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:29:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:29:59,379 INFO L82 PathProgramCache]: Analyzing trace with hash 972334352, now seen corresponding path program 1 times [2020-10-12 20:29:59,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:29:59,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468606655] [2020-10-12 20:29:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:29:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:29:59,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:00,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:01,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:01,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:02,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:03,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:03,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:04,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:30:04,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-10-12 20:30:04,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 20:30:04,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-12 20:30:04,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:30:04,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:30:04,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:30:04,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-12 20:30:04,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:30:05,813 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-12 20:30:05,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:30:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:30:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:05,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:30:05,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:30:05,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:30:05,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-12 20:30:05,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:30:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:30:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:30:05,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:30:05,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:30:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:30:06,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468606655] [2020-10-12 20:30:06,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:30:06,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:30:06,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348046148] [2020-10-12 20:30:06,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:30:06,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:30:06,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:30:06,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:30:06,383 INFO L87 Difference]: Start difference. First operand 5501 states and 9030 transitions. Second operand 5 states. [2020-10-12 20:30:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:30:20,694 INFO L93 Difference]: Finished difference Result 16195 states and 26542 transitions. [2020-10-12 20:30:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:30:20,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 491 [2020-10-12 20:30:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:30:20,739 INFO L225 Difference]: With dead ends: 16195 [2020-10-12 20:30:20,739 INFO L226 Difference]: Without dead ends: 10800 [2020-10-12 20:30:20,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:30:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10800 states. [2020-10-12 20:30:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10800 to 10798. [2020-10-12 20:30:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10798 states. [2020-10-12 20:30:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10798 states to 10798 states and 17627 transitions. [2020-10-12 20:30:21,333 INFO L78 Accepts]: Start accepts. Automaton has 10798 states and 17627 transitions. Word has length 491 [2020-10-12 20:30:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:30:21,334 INFO L479 AbstractCegarLoop]: Abstraction has 10798 states and 17627 transitions. [2020-10-12 20:30:21,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:30:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10798 states and 17627 transitions. [2020-10-12 20:30:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-12 20:30:21,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:30:21,375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:30:21,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:30:21,375 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:30:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:30:21,376 INFO L82 PathProgramCache]: Analyzing trace with hash 719454648, now seen corresponding path program 1 times [2020-10-12 20:30:21,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:30:21,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840261328] [2020-10-12 20:30:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:30:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:30:21,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:22,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:22,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:23,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:23,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:23,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:23,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:24,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:26,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:30:26,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 499 [2020-10-12 20:30:26,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 20:30:26,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-12 20:30:26,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:30:26,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:30:26,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:30:26,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-12 20:30:26,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:30:27,743 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-12 20:30:27,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:30:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:30:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:27,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:30:27,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:30:27,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:30:27,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 20:30:27,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:30:27,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:30:27,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:30:27,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:30:27,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:30:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:30:28,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840261328] [2020-10-12 20:30:28,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:30:28,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:30:28,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283393193] [2020-10-12 20:30:28,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:30:28,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:30:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:30:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:30:28,076 INFO L87 Difference]: Start difference. First operand 10798 states and 17627 transitions. Second operand 5 states. [2020-10-12 20:30:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:30:44,304 INFO L93 Difference]: Finished difference Result 31805 states and 51866 transitions. [2020-10-12 20:30:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:30:44,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-10-12 20:30:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:30:44,370 INFO L225 Difference]: With dead ends: 31805 [2020-10-12 20:30:44,370 INFO L226 Difference]: Without dead ends: 21275 [2020-10-12 20:30:44,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:30:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21275 states. [2020-10-12 20:30:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21275 to 21273. [2020-10-12 20:30:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21273 states. [2020-10-12 20:30:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21273 states to 21273 states and 34564 transitions. [2020-10-12 20:30:45,324 INFO L78 Accepts]: Start accepts. Automaton has 21273 states and 34564 transitions. Word has length 493 [2020-10-12 20:30:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:30:45,324 INFO L479 AbstractCegarLoop]: Abstraction has 21273 states and 34564 transitions. [2020-10-12 20:30:45,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:30:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 21273 states and 34564 transitions. [2020-10-12 20:30:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-12 20:30:45,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:30:45,380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:30:45,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:30:45,380 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:30:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:30:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash -738859494, now seen corresponding path program 1 times [2020-10-12 20:30:45,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:30:45,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672640084] [2020-10-12 20:30:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:30:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:30:45,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:45,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:45,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:46,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:46,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:46,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:46,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:47,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:47,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:48,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:48,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:50,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:30:50,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 503 [2020-10-12 20:30:50,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 20:30:50,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-12 20:30:50,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:30:50,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:30:50,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:30:50,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-12 20:30:50,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:30:51,688 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-12 20:30:51,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:30:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:30:51,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:30:51,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:30:51,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:30:51,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:30:51,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 20:30:51,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:30:51,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:30:51,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:30:51,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:30:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:30:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:30:52,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672640084] [2020-10-12 20:30:52,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:30:52,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:30:52,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468733538] [2020-10-12 20:30:52,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:30:52,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:30:52,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:30:52,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:30:52,232 INFO L87 Difference]: Start difference. First operand 21273 states and 34564 transitions. Second operand 5 states. [2020-10-12 20:31:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:31:10,714 INFO L93 Difference]: Finished difference Result 62159 states and 100779 transitions. [2020-10-12 20:31:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:31:10,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-10-12 20:31:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:31:10,848 INFO L225 Difference]: With dead ends: 62159 [2020-10-12 20:31:10,848 INFO L226 Difference]: Without dead ends: 42093 [2020-10-12 20:31:10,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:31:10,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42093 states. [2020-10-12 20:31:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42093 to 42091. [2020-10-12 20:31:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42091 states. [2020-10-12 20:31:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42091 states to 42091 states and 68105 transitions. [2020-10-12 20:31:14,481 INFO L78 Accepts]: Start accepts. Automaton has 42091 states and 68105 transitions. Word has length 497 [2020-10-12 20:31:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:31:14,482 INFO L479 AbstractCegarLoop]: Abstraction has 42091 states and 68105 transitions. [2020-10-12 20:31:14,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:31:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 42091 states and 68105 transitions. [2020-10-12 20:31:14,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-10-12 20:31:14,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:31:14,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:31:14,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:31:14,556 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:31:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:31:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash 469779614, now seen corresponding path program 1 times [2020-10-12 20:31:14,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:31:14,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143595568] [2020-10-12 20:31:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:31:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:31:14,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:15,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:15,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:15,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:16,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:16,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:19,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:31:19,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-12 20:31:19,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:31:19,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 20:31:19,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:31:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:31:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 20:31:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 20:31:19,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:31:20,628 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-12 20:31:20,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:31:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:31:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:20,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:31:20,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:31:20,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:31:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 20:31:20,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:31:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:31:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:31:20,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:31:20,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:31:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:31:20,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143595568] [2020-10-12 20:31:20,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:31:20,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:31:20,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796085948] [2020-10-12 20:31:20,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:31:20,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:31:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:31:20,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:31:20,813 INFO L87 Difference]: Start difference. First operand 42091 states and 68105 transitions. Second operand 5 states. [2020-10-12 20:31:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:31:55,273 INFO L93 Difference]: Finished difference Result 152779 states and 245195 transitions. [2020-10-12 20:31:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:31:55,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 501 [2020-10-12 20:31:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:31:55,547 INFO L225 Difference]: With dead ends: 152779 [2020-10-12 20:31:55,547 INFO L226 Difference]: Without dead ends: 115561 [2020-10-12 20:31:55,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:31:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115561 states. [2020-10-12 20:31:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115561 to 46485. [2020-10-12 20:31:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46485 states. [2020-10-12 20:31:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46485 states to 46485 states and 75946 transitions. [2020-10-12 20:31:58,760 INFO L78 Accepts]: Start accepts. Automaton has 46485 states and 75946 transitions. Word has length 501 [2020-10-12 20:31:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:31:58,760 INFO L479 AbstractCegarLoop]: Abstraction has 46485 states and 75946 transitions. [2020-10-12 20:31:58,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:31:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 46485 states and 75946 transitions. [2020-10-12 20:31:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-10-12 20:31:58,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:31:58,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:31:58,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:31:58,805 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:31:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:31:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1609346635, now seen corresponding path program 1 times [2020-10-12 20:31:58,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:31:58,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373302236] [2020-10-12 20:31:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:31:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:31:59,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:59,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:59,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:59,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:31:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:02,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:02,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:03,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:03,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:03,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:03,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:32:03,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-12 20:32:03,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 20:32:03,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 20:32:03,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:32:03,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:32:03,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:32:03,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 255 [2020-10-12 20:32:03,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:32:04,957 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-12 20:32:04,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:32:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:32:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:05,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:32:05,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:32:05,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:32:05,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 20:32:05,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:32:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:32:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:32:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:32:05,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:32:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:32:05,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373302236] [2020-10-12 20:32:05,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:32:05,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:32:05,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275247665] [2020-10-12 20:32:05,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:32:05,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:32:05,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:32:05,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:32:05,277 INFO L87 Difference]: Start difference. First operand 46485 states and 75946 transitions. Second operand 9 states. [2020-10-12 20:32:06,187 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2020-10-12 20:32:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:32:25,109 INFO L93 Difference]: Finished difference Result 106309 states and 170422 transitions. [2020-10-12 20:32:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 20:32:25,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 501 [2020-10-12 20:32:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:32:25,239 INFO L225 Difference]: With dead ends: 106309 [2020-10-12 20:32:25,239 INFO L226 Difference]: Without dead ends: 80531 [2020-10-12 20:32:25,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-12 20:32:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80531 states. [2020-10-12 20:32:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80531 to 54173. [2020-10-12 20:32:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54173 states. [2020-10-12 20:32:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54173 states to 54173 states and 87362 transitions. [2020-10-12 20:32:28,997 INFO L78 Accepts]: Start accepts. Automaton has 54173 states and 87362 transitions. Word has length 501 [2020-10-12 20:32:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:32:28,998 INFO L479 AbstractCegarLoop]: Abstraction has 54173 states and 87362 transitions. [2020-10-12 20:32:28,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:32:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 54173 states and 87362 transitions. [2020-10-12 20:32:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-10-12 20:32:29,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:32:29,057 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:32:29,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:32:29,058 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:32:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:32:29,058 INFO L82 PathProgramCache]: Analyzing trace with hash -106760187, now seen corresponding path program 1 times [2020-10-12 20:32:29,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:32:29,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928187735] [2020-10-12 20:32:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:32:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:32:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:29,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:30,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:30,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:30,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:30,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:31,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:32:31,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking...