/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 SingleStatement --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:36:59,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:36:59,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:36:59,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:36:59,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:36:59,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:36:59,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:36:59,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:36:59,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:36:59,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:36:59,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:36:59,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:36:59,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:36:59,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:36:59,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:36:59,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:36:59,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:36:59,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:36:59,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:36:59,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:36:59,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:36:59,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:36:59,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:36:59,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:36:59,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:36:59,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:36:59,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:36:59,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:36:59,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:36:59,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:36:59,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:36:59,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:36:59,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:36:59,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:36:59,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:36:59,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:36:59,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:36:59,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:36:59,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:36:59,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:36:59,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:36:59,176 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 [2020-09-24 19:36:59,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:36:59,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:36:59,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:36:59,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:36:59,226 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:36:59,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:36:59,227 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:36:59,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:36:59,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:36:59,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:36:59,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:36:59,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:36:59,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:36:59,230 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:36:59,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:36:59,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:36:59,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:36:59,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:36:59,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:36:59,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:36:59,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:36:59,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:36:59,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:36:59,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:36:59,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:36:59,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:36:59,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:36:59,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:36:59,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:36:59,233 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 -> SingleStatement 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:36:59,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:36:59,768 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:36:59,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:36:59,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:36:59,777 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:36:59,778 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 19:36:59,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf78441e9/eed341a4832f458a9dedcda81b52dd87/FLAG1c61be9ad [2020-09-24 19:37:00,590 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:37:00,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 19:37:00,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf78441e9/eed341a4832f458a9dedcda81b52dd87/FLAG1c61be9ad [2020-09-24 19:37:00,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf78441e9/eed341a4832f458a9dedcda81b52dd87 [2020-09-24 19:37:00,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:37:00,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:37:00,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:37:00,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:37:00,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:37:00,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c2f82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:00, skipping insertion in model container [2020-09-24 19:37:00,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:00,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:37:00,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:37:01,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:37:01,566 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:37:01,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:37:01,761 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:37:01,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01 WrapperNode [2020-09-24 19:37:01,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:37:01,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:37:01,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:37:01,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:37:01,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (1/1) ... [2020-09-24 19:37:01,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (1/1) ... [2020-09-24 19:37:01,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (1/1) ... [2020-09-24 19:37:01,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (1/1) ... [2020-09-24 19:37:01,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (1/1) ... [2020-09-24 19:37:01,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (1/1) ... [2020-09-24 19:37:01,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (1/1) ... [2020-09-24 19:37:01,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:37:01,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:37:01,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:37:01,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:37:01,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (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 [2020-09-24 19:37:01,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:37:01,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:37:01,976 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:37:01,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:37:01,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:37:01,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 19:37:01,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 19:37:01,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 19:37:01,978 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 19:37:01,979 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:37:01,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:37:01,979 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 19:37:01,979 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 19:37:01,979 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 19:37:01,980 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 19:37:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 19:37:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 19:37:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 19:37:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:37:01,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:37:01,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:37:03,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:37:03,982 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:37:03,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:37:03 BoogieIcfgContainer [2020-09-24 19:37:03,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:37:03,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:37:03,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:37:04,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:37:04,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:37:00" (1/3) ... [2020-09-24 19:37:04,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1e95d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:37:04, skipping insertion in model container [2020-09-24 19:37:04,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01" (2/3) ... [2020-09-24 19:37:04,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1e95d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:37:04, skipping insertion in model container [2020-09-24 19:37:04,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:37:03" (3/3) ... [2020-09-24 19:37:04,005 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 19:37:04,017 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:37:04,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:37:04,053 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:37:04,098 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:37:04,098 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:37:04,098 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:37:04,098 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:37:04,099 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:37:04,099 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:37:04,099 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:37:04,099 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:37:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-24 19:37:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 19:37:04,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:04,206 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] [2020-09-24 19:37:04,207 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-24 19:37:04,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:04,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645745764] [2020-09-24 19:37:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:05,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:05,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 19:37:05,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:37:05,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1163 [2020-09-24 19:37:05,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:05,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:05,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-24 19:37:05,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-24 19:37:05,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:37:06,719 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:06,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:06,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:06,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:06,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:06,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 19:37:06,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:06,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:07,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645745764] [2020-09-24 19:37:07,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:07,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:07,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147728729] [2020-09-24 19:37:07,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:07,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:07,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:07,213 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-24 19:37:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:11,003 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-24 19:37:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:11,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-24 19:37:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:11,039 INFO L225 Difference]: With dead ends: 1657 [2020-09-24 19:37:11,039 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 19:37:11,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 19:37:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-24 19:37:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-24 19:37:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-24 19:37:11,195 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-24 19:37:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:11,196 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-24 19:37:11,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-24 19:37:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 19:37:11,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:11,208 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] [2020-09-24 19:37:11,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:37:11,208 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:11,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-24 19:37:11,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:11,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723555053] [2020-09-24 19:37:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:12,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 19:37:12,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:12,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-09-24 19:37:12,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:12,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:12,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-24 19:37:12,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-24 19:37:12,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:12,819 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:12,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:12,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 19:37:12,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:12,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:12,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:12,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:12,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 19:37:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:13,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723555053] [2020-09-24 19:37:13,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:13,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:13,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629980927] [2020-09-24 19:37:13,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:13,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:13,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:13,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:13,149 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-24 19:37:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:15,880 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-24 19:37:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:15,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-24 19:37:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:15,894 INFO L225 Difference]: With dead ends: 2498 [2020-09-24 19:37:15,894 INFO L226 Difference]: Without dead ends: 2052 [2020-09-24 19:37:15,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-24 19:37:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-24 19:37:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-24 19:37:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-24 19:37:15,958 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-24 19:37:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:15,959 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-24 19:37:15,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-24 19:37:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 19:37:15,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:15,965 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] [2020-09-24 19:37:15,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:37:15,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-24 19:37:15,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:15,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685378838] [2020-09-24 19:37:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:16,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:16,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:17,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:17,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:17,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 19:37:17,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:17,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-09-24 19:37:17,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:17,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:17,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-24 19:37:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 19:37:17,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:17,618 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:17,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:17,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:17,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:17,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:17,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 19:37:17,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:17,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:17,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:17,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:17,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:17,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685378838] [2020-09-24 19:37:17,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:17,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:17,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008997976] [2020-09-24 19:37:17,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:17,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:17,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:17,948 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-24 19:37:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:22,969 INFO L93 Difference]: Finished difference Result 5515 states and 6939 transitions. [2020-09-24 19:37:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:37:22,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-24 19:37:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:22,991 INFO L225 Difference]: With dead ends: 5515 [2020-09-24 19:37:22,991 INFO L226 Difference]: Without dead ends: 3792 [2020-09-24 19:37:22,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:37:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2020-09-24 19:37:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 3790. [2020-09-24 19:37:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3790 states. [2020-09-24 19:37:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 4733 transitions. [2020-09-24 19:37:23,207 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 4733 transitions. Word has length 449 [2020-09-24 19:37:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:23,208 INFO L479 AbstractCegarLoop]: Abstraction has 3790 states and 4733 transitions. [2020-09-24 19:37:23,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:37:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 4733 transitions. [2020-09-24 19:37:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-24 19:37:23,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:23,216 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] [2020-09-24 19:37:23,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:37:23,217 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1835563254, now seen corresponding path program 1 times [2020-09-24 19:37:23,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:23,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898197514] [2020-09-24 19:37:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:23,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:23,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:23,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:23,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:24,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:24,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:24,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:24,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-24 19:37:24,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:24,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-09-24 19:37:24,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-09-24 19:37:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 19:37:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:24,624 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:24,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:24,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:24,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:24,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:24,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:24,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 19:37:24,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:24,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:24,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:24,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898197514] [2020-09-24 19:37:24,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:24,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:24,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040371404] [2020-09-24 19:37:24,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:24,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:24,895 INFO L87 Difference]: Start difference. First operand 3790 states and 4733 transitions. Second operand 4 states. [2020-09-24 19:37:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:29,416 INFO L93 Difference]: Finished difference Result 10881 states and 13650 transitions. [2020-09-24 19:37:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:29,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2020-09-24 19:37:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:29,449 INFO L225 Difference]: With dead ends: 10881 [2020-09-24 19:37:29,449 INFO L226 Difference]: Without dead ends: 7338 [2020-09-24 19:37:29,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2020-09-24 19:37:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 3796. [2020-09-24 19:37:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3796 states. [2020-09-24 19:37:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 4741 transitions. [2020-09-24 19:37:29,623 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 4741 transitions. Word has length 450 [2020-09-24 19:37:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:29,624 INFO L479 AbstractCegarLoop]: Abstraction has 3796 states and 4741 transitions. [2020-09-24 19:37:29,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 4741 transitions. [2020-09-24 19:37:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-24 19:37:29,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:29,634 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] [2020-09-24 19:37:29,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:37:29,635 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1682956299, now seen corresponding path program 1 times [2020-09-24 19:37:29,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:29,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551939107] [2020-09-24 19:37:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:30,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:30,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:30,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:30,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 458 [2020-09-24 19:37:30,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:37:30,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-09-24 19:37:30,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:30,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:30,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-24 19:37:30,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 19:37:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:31,217 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:31,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:31,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:31,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:31,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:31,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:31,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 19:37:31,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:31,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:31,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:31,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:31,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:31,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551939107] [2020-09-24 19:37:31,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:31,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:31,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847429170] [2020-09-24 19:37:31,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:31,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:31,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:31,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:31,554 INFO L87 Difference]: Start difference. First operand 3796 states and 4741 transitions. Second operand 5 states. [2020-09-24 19:37:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:36,590 INFO L93 Difference]: Finished difference Result 10005 states and 12529 transitions. [2020-09-24 19:37:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:37:36,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 451 [2020-09-24 19:37:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:36,615 INFO L225 Difference]: With dead ends: 10005 [2020-09-24 19:37:36,615 INFO L226 Difference]: Without dead ends: 6462 [2020-09-24 19:37:36,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:37:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2020-09-24 19:37:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 6460. [2020-09-24 19:37:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6460 states. [2020-09-24 19:37:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 8034 transitions. [2020-09-24 19:37:36,886 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 8034 transitions. Word has length 451 [2020-09-24 19:37:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:36,887 INFO L479 AbstractCegarLoop]: Abstraction has 6460 states and 8034 transitions. [2020-09-24 19:37:36,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:37:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 8034 transitions. [2020-09-24 19:37:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-09-24 19:37:36,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:36,898 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] [2020-09-24 19:37:36,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:37:36,898 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1837830098, now seen corresponding path program 1 times [2020-09-24 19:37:36,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:36,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710836766] [2020-09-24 19:37:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:37,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:37,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:37,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:37,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 459 [2020-09-24 19:37:37,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:37:37,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 19:37:37,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:37,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-24 19:37:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 19:37:37,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:38,286 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:38,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:38,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:38,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:38,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:38,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:38,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 19:37:38,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:38,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:38,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:38,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710836766] [2020-09-24 19:37:38,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:38,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:38,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248677399] [2020-09-24 19:37:38,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:38,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:38,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:38,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:38,571 INFO L87 Difference]: Start difference. First operand 6460 states and 8034 transitions. Second operand 4 states. [2020-09-24 19:37:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:42,255 INFO L93 Difference]: Finished difference Result 18885 states and 23545 transitions. [2020-09-24 19:37:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:42,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 452 [2020-09-24 19:37:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:42,299 INFO L225 Difference]: With dead ends: 18885 [2020-09-24 19:37:42,300 INFO L226 Difference]: Without dead ends: 12704 [2020-09-24 19:37:42,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2020-09-24 19:37:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 6462. [2020-09-24 19:37:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6462 states. [2020-09-24 19:37:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8036 transitions. [2020-09-24 19:37:42,582 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8036 transitions. Word has length 452 [2020-09-24 19:37:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:42,582 INFO L479 AbstractCegarLoop]: Abstraction has 6462 states and 8036 transitions. [2020-09-24 19:37:42,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8036 transitions. [2020-09-24 19:37:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-24 19:37:42,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:42,593 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] [2020-09-24 19:37:42,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:37:42,594 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash 909417697, now seen corresponding path program 1 times [2020-09-24 19:37:42,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:42,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783741727] [2020-09-24 19:37:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:42,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:43,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:43,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:43,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:43,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 460 [2020-09-24 19:37:43,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:37:43,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-24 19:37:43,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:43,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-24 19:37:43,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-09-24 19:37:43,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:44,121 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:44,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:44,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:44,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:44,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:44,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:44,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 19:37:44,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:44,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:44,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:44,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783741727] [2020-09-24 19:37:44,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:44,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:44,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225488094] [2020-09-24 19:37:44,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:44,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:44,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:44,486 INFO L87 Difference]: Start difference. First operand 6462 states and 8036 transitions. Second operand 5 states. [2020-09-24 19:37:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:49,314 INFO L93 Difference]: Finished difference Result 18476 states and 23008 transitions. [2020-09-24 19:37:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:37:49,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 453 [2020-09-24 19:37:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:49,337 INFO L225 Difference]: With dead ends: 18476 [2020-09-24 19:37:49,338 INFO L226 Difference]: Without dead ends: 12246 [2020-09-24 19:37:49,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:37:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12246 states. [2020-09-24 19:37:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12246 to 12244. [2020-09-24 19:37:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12244 states. [2020-09-24 19:37:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12244 states to 12244 states and 15148 transitions. [2020-09-24 19:37:49,791 INFO L78 Accepts]: Start accepts. Automaton has 12244 states and 15148 transitions. Word has length 453 [2020-09-24 19:37:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:49,792 INFO L479 AbstractCegarLoop]: Abstraction has 12244 states and 15148 transitions. [2020-09-24 19:37:49,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:37:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 12244 states and 15148 transitions. [2020-09-24 19:37:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-09-24 19:37:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:49,821 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] [2020-09-24 19:37:49,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:37:49,822 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash 118369798, now seen corresponding path program 1 times [2020-09-24 19:37:49,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:49,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000636157] [2020-09-24 19:37:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:49,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:50,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:50,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:50,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:50,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 461 [2020-09-24 19:37:50,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:37:50,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-09-24 19:37:50,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:50,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:50,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-24 19:37:50,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 19:37:50,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:51,328 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 19:37:51,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:51,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:51,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:37:51,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:51,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 19:37:51,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:51,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:51,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:51,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000636157] [2020-09-24 19:37:51,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:51,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:51,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752756252] [2020-09-24 19:37:51,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:51,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:51,775 INFO L87 Difference]: Start difference. First operand 12244 states and 15148 transitions. Second operand 4 states.