/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:12:03,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:12:03,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:12:03,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:12:03,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:12:03,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:12:03,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:12:03,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:12:03,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:12:03,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:12:03,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:12:03,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:12:03,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:12:03,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:12:03,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:12:03,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:12:03,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:12:03,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:12:03,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:12:03,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:12:03,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:12:03,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:12:03,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:12:03,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:12:03,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:12:03,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:12:03,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:12:03,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:12:03,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:12:03,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:12:03,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:12:03,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:12:03,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:12:03,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:12:03,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:12:03,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:12:03,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:12:03,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:12:03,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:12:03,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:12:03,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:12:03,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 15:12:03,136 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:12:03,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:12:03,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:12:03,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:12:03,139 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:12:03,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:12:03,139 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:12:03,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:12:03,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:12:03,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:12:03,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:12:03,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:12:03,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:12:03,140 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:12:03,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:12:03,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:12:03,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:12:03,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:12:03,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:12:03,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:12:03,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:12:03,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:12:03,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:12:03,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:12:03,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:12:03,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:12:03,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:12:03,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:12:03,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:12:03,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:12:03,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:12:03,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:12:03,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:12:03,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:12:03,468 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:12:03,468 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:12:03,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49c5caadc/1915a1a2d6354fa99d768c0fb20c43d3/FLAGa9a848db9 [2020-10-13 15:12:04,209 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:12:04,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:12:04,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49c5caadc/1915a1a2d6354fa99d768c0fb20c43d3/FLAGa9a848db9 [2020-10-13 15:12:04,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49c5caadc/1915a1a2d6354fa99d768c0fb20c43d3 [2020-10-13 15:12:04,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:12:04,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:12:04,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:12:04,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:12:04,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:12:04,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:12:04" (1/1) ... [2020-10-13 15:12:04,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c752f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:04, skipping insertion in model container [2020-10-13 15:12:04,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:12:04" (1/1) ... [2020-10-13 15:12:04,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:12:04,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:12:05,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:12:05,798 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:12:06,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:12:06,728 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:12:06,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06 WrapperNode [2020-10-13 15:12:06,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:12:06,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:12:06,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:12:06,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:12:06,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... [2020-10-13 15:12:06,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... [2020-10-13 15:12:06,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... [2020-10-13 15:12:06,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... [2020-10-13 15:12:06,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... [2020-10-13 15:12:06,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... [2020-10-13 15:12:07,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... [2020-10-13 15:12:07,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:12:07,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:12:07,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:12:07,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:12:07,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:12:07,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:12:07,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:12:07,125 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:12:07,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:12:07,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:12:07,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 15:12:07,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:12:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 15:12:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:12:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:12:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 15:12:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 15:12:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 15:12:07,129 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 15:12:07,129 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 15:12:07,130 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 15:12:07,130 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 15:12:07,130 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 15:12:07,131 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:12:07,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:12:07,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:12:07,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:12:11,701 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:12:11,702 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 15:12:11,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:12:11 BoogieIcfgContainer [2020-10-13 15:12:11,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:12:11,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:12:11,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:12:11,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:12:11,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:12:04" (1/3) ... [2020-10-13 15:12:11,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66be87b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:12:11, skipping insertion in model container [2020-10-13 15:12:11,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:12:06" (2/3) ... [2020-10-13 15:12:11,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66be87b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:12:11, skipping insertion in model container [2020-10-13 15:12:11,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:12:11" (3/3) ... [2020-10-13 15:12:11,724 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:12:11,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:12:11,745 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:12:11,760 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:12:11,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:12:11,790 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:12:11,790 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:12:11,790 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:12:11,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:12:11,791 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:12:11,791 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:12:11,791 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:12:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states. [2020-10-13 15:12:11,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-13 15:12:11,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:11,881 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] [2020-10-13 15:12:11,882 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -313895885, now seen corresponding path program 1 times [2020-10-13 15:12:11,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:11,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545991146] [2020-10-13 15:12:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:13,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:13,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:14,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:14,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:15,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:15,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:17,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:17,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:17,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-13 15:12:17,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:12:17,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-13 15:12:17,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:17,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:12:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-13 15:12:17,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:12:17,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 15:12:19,537 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:12:19,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:12:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:19,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:19,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:12:19,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:12:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 15:12:19,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:12:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:12:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:12:19,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:12:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:12:19,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545991146] [2020-10-13 15:12:19,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:12:19,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:12:19,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513050456] [2020-10-13 15:12:19,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:12:19,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:12:19,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:12:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:12:19,860 INFO L87 Difference]: Start difference. First operand 1549 states. Second operand 4 states. [2020-10-13 15:12:20,855 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:12:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:35,206 INFO L93 Difference]: Finished difference Result 3151 states and 5497 transitions. [2020-10-13 15:12:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:12:35,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-13 15:12:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:35,253 INFO L225 Difference]: With dead ends: 3151 [2020-10-13 15:12:35,253 INFO L226 Difference]: Without dead ends: 2174 [2020-10-13 15:12:35,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:12:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2020-10-13 15:12:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2172. [2020-10-13 15:12:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2172 states. [2020-10-13 15:12:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 3629 transitions. [2020-10-13 15:12:35,446 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 3629 transitions. Word has length 391 [2020-10-13 15:12:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:35,451 INFO L479 AbstractCegarLoop]: Abstraction has 2172 states and 3629 transitions. [2020-10-13 15:12:35,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:12:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 3629 transitions. [2020-10-13 15:12:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-13 15:12:35,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:35,466 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] [2020-10-13 15:12:35,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:12:35,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:35,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1521302020, now seen corresponding path program 1 times [2020-10-13 15:12:35,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:35,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102061376] [2020-10-13 15:12:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:35,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:36,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:36,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:36,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:37,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:37,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:38,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:38,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:39,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:39,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:40,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:40,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:40,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-13 15:12:40,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 15:12:40,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5221 [2020-10-13 15:12:40,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:40,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:12:40,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-13 15:12:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 15:12:40,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:12:41,982 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:12:41,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:12:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:42,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:42,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:12:42,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:12:42,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 15:12:42,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:12:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:12:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:12:42,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:12:42,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102061376] [2020-10-13 15:12:42,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:12:42,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:12:42,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697490644] [2020-10-13 15:12:42,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:12:42,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:12:42,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:12:42,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:12:42,322 INFO L87 Difference]: Start difference. First operand 2172 states and 3629 transitions. Second operand 4 states. [2020-10-13 15:12:43,484 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:12:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:57,107 INFO L93 Difference]: Finished difference Result 4814 states and 7959 transitions. [2020-10-13 15:12:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:12:57,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-13 15:12:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:57,126 INFO L225 Difference]: With dead ends: 4814 [2020-10-13 15:12:57,126 INFO L226 Difference]: Without dead ends: 3250 [2020-10-13 15:12:57,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:12:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-10-13 15:12:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3248. [2020-10-13 15:12:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2020-10-13 15:12:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5383 transitions. [2020-10-13 15:12:57,243 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5383 transitions. Word has length 391 [2020-10-13 15:12:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:57,244 INFO L479 AbstractCegarLoop]: Abstraction has 3248 states and 5383 transitions. [2020-10-13 15:12:57,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:12:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5383 transitions. [2020-10-13 15:12:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-13 15:12:57,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:57,256 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] [2020-10-13 15:12:57,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:12:57,257 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -979601930, now seen corresponding path program 1 times [2020-10-13 15:12:57,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:57,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45957726] [2020-10-13 15:12:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:58,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:59,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:59,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:02,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-13 15:13:02,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:13:02,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 15:13:02,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-13 15:13:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:13:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:03,378 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:13:03,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:03,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:03,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:03,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:03,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:13:03,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:03,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:13:03,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45957726] [2020-10-13 15:13:03,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:03,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:03,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506286962] [2020-10-13 15:13:03,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:03,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:03,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:03,630 INFO L87 Difference]: Start difference. First operand 3248 states and 5383 transitions. Second operand 4 states. [2020-10-13 15:13:04,422 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:13:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:13:16,926 INFO L93 Difference]: Finished difference Result 7458 states and 12251 transitions. [2020-10-13 15:13:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:13:16,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-13 15:13:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:13:16,952 INFO L225 Difference]: With dead ends: 7458 [2020-10-13 15:13:16,952 INFO L226 Difference]: Without dead ends: 4884 [2020-10-13 15:13:16,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:13:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2020-10-13 15:13:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4882. [2020-10-13 15:13:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4882 states. [2020-10-13 15:13:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 8022 transitions. [2020-10-13 15:13:17,230 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 8022 transitions. Word has length 391 [2020-10-13 15:13:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:13:17,231 INFO L479 AbstractCegarLoop]: Abstraction has 4882 states and 8022 transitions. [2020-10-13 15:13:17,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:13:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 8022 transitions. [2020-10-13 15:13:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-13 15:13:17,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:13:17,247 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] [2020-10-13 15:13:17,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:13:17,247 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:13:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:13:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1754233814, now seen corresponding path program 1 times [2020-10-13 15:13:17,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:13:17,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911605842] [2020-10-13 15:13:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:13:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:17,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:17,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:18,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:18,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:18,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:18,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:18,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:19,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:19,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:20,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:22,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:22,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-13 15:13:22,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:13:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 15:13:22,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-13 15:13:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 15:13:22,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:13:23,343 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:13:23,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:23,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:23,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:23,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:23,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:23,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 15:13:23,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:23,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:13:23,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911605842] [2020-10-13 15:13:23,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:23,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:23,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142833054] [2020-10-13 15:13:23,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:23,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:23,525 INFO L87 Difference]: Start difference. First operand 4882 states and 8022 transitions. Second operand 4 states. [2020-10-13 15:13:24,317 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:13:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:13:35,974 INFO L93 Difference]: Finished difference Result 11894 states and 19395 transitions. [2020-10-13 15:13:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:13:35,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-13 15:13:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:13:36,006 INFO L225 Difference]: With dead ends: 11894 [2020-10-13 15:13:36,007 INFO L226 Difference]: Without dead ends: 7714 [2020-10-13 15:13:36,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:13:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2020-10-13 15:13:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7712. [2020-10-13 15:13:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7712 states. [2020-10-13 15:13:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7712 states to 7712 states and 12567 transitions. [2020-10-13 15:13:36,273 INFO L78 Accepts]: Start accepts. Automaton has 7712 states and 12567 transitions. Word has length 391 [2020-10-13 15:13:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:13:36,274 INFO L479 AbstractCegarLoop]: Abstraction has 7712 states and 12567 transitions. [2020-10-13 15:13:36,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:13:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7712 states and 12567 transitions. [2020-10-13 15:13:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-13 15:13:36,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:13:36,290 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] [2020-10-13 15:13:36,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:13:36,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:13:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:13:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1814236799, now seen corresponding path program 1 times [2020-10-13 15:13:36,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:13:36,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263298305] [2020-10-13 15:13:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:13:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:36,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:36,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:37,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:37,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:37,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:38,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:38,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:41,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:41,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-13 15:13:41,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:13:41,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 15:13:41,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-10-13 15:13:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:13:41,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:42,369 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:13:42,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:42,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:42,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:42,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:42,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 15:13:42,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:13:42,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263298305] [2020-10-13 15:13:42,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:42,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:42,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989346] [2020-10-13 15:13:42,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:42,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:42,579 INFO L87 Difference]: Start difference. First operand 7712 states and 12567 transitions. Second operand 4 states. [2020-10-13 15:13:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:13:54,674 INFO L93 Difference]: Finished difference Result 20260 states and 32880 transitions. [2020-10-13 15:13:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:13:54,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-13 15:13:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:13:54,724 INFO L225 Difference]: With dead ends: 20260 [2020-10-13 15:13:54,724 INFO L226 Difference]: Without dead ends: 13426 [2020-10-13 15:13:54,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13426 states. [2020-10-13 15:13:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13426 to 12840. [2020-10-13 15:13:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12840 states. [2020-10-13 15:13:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12840 states to 12840 states and 20694 transitions. [2020-10-13 15:13:55,205 INFO L78 Accepts]: Start accepts. Automaton has 12840 states and 20694 transitions. Word has length 391 [2020-10-13 15:13:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:13:55,206 INFO L479 AbstractCegarLoop]: Abstraction has 12840 states and 20694 transitions. [2020-10-13 15:13:55,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:13:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 12840 states and 20694 transitions. [2020-10-13 15:13:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-13 15:13:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:13:55,229 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] [2020-10-13 15:13:55,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:13:55,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:13:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:13:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash 291627559, now seen corresponding path program 1 times [2020-10-13 15:13:55,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:13:55,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955114185] [2020-10-13 15:13:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:13:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:55,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:56,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:56,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:56,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:56,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:56,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:57,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:00,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:00,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-13 15:14:00,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:14:00,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 15:14:00,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:00,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:14:00,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-13 15:14:00,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:14:00,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:14:01,252 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:14:01,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:14:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:01,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:01,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:01,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:14:01,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:14:01,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 15:14:01,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:01,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:14:01,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:14:01,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:14:01,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:14:01,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955114185] [2020-10-13 15:14:01,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:14:01,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:14:01,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73214488] [2020-10-13 15:14:01,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:14:01,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:14:01,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:14:01,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:01,503 INFO L87 Difference]: Start difference. First operand 12840 states and 20694 transitions. Second operand 4 states. [2020-10-13 15:14:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:14:11,046 INFO L93 Difference]: Finished difference Result 19948 states and 32400 transitions. [2020-10-13 15:14:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:14:11,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 391 [2020-10-13 15:14:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:14:11,061 INFO L225 Difference]: With dead ends: 19948 [2020-10-13 15:14:11,061 INFO L226 Difference]: Without dead ends: 8786 [2020-10-13 15:14:11,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2020-10-13 15:14:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 8784. [2020-10-13 15:14:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8784 states. [2020-10-13 15:14:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 14308 transitions. [2020-10-13 15:14:11,391 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 14308 transitions. Word has length 391 [2020-10-13 15:14:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:14:11,392 INFO L479 AbstractCegarLoop]: Abstraction has 8784 states and 14308 transitions. [2020-10-13 15:14:11,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:14:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 14308 transitions. [2020-10-13 15:14:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:14:11,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:14:11,405 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] [2020-10-13 15:14:11,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:14:11,406 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:14:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:14:11,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1852292909, now seen corresponding path program 1 times [2020-10-13 15:14:11,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:14:11,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657858798] [2020-10-13 15:14:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:14:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:11,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:12,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:12,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:12,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:12,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:13,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:13,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:13,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:16,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:16,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:14:16,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:14:16,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 15:14:16,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:16,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:14:16,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-13 15:14:16,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:14:16,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:17,494 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:14:17,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:14:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:17,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:17,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:14:17,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:14:17,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:14:17,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:14:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:14:17,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:14:17,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:14:17,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657858798] [2020-10-13 15:14:17,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:14:17,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:14:17,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044484961] [2020-10-13 15:14:17,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:14:17,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:14:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:14:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:17,643 INFO L87 Difference]: Start difference. First operand 8784 states and 14308 transitions. Second operand 4 states. [2020-10-13 15:14:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:14:27,867 INFO L93 Difference]: Finished difference Result 11804 states and 19290 transitions. [2020-10-13 15:14:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:14:27,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:14:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:14:27,892 INFO L225 Difference]: With dead ends: 11804 [2020-10-13 15:14:27,893 INFO L226 Difference]: Without dead ends: 4858 [2020-10-13 15:14:27,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2020-10-13 15:14:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4856. [2020-10-13 15:14:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-10-13 15:14:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 7920 transitions. [2020-10-13 15:14:28,055 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 7920 transitions. Word has length 396 [2020-10-13 15:14:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:14:28,055 INFO L479 AbstractCegarLoop]: Abstraction has 4856 states and 7920 transitions. [2020-10-13 15:14:28,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:14:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 7920 transitions. [2020-10-13 15:14:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:14:28,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:14:28,064 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] [2020-10-13 15:14:28,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:14:28,064 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:14:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:14:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1886282756, now seen corresponding path program 1 times [2020-10-13 15:14:28,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:14:28,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930160592] [2020-10-13 15:14:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:14:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:28,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:28,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:29,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:30,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:30,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:31,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:33,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:33,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:14:33,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:14:33,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 15:14:33,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:14:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 340 [2020-10-13 15:14:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 15:14:33,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:34,126 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:14:34,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:14:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:34,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:34,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:34,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:14:34,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:14:34,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:14:34,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:14:34,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:14:34,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:14:34,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:14:34,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930160592] [2020-10-13 15:14:34,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:14:34,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:14:34,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647561613] [2020-10-13 15:14:34,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:14:34,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:14:34,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:14:34,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:34,250 INFO L87 Difference]: Start difference. First operand 4856 states and 7920 transitions. Second operand 4 states. [2020-10-13 15:14:35,047 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-10-13 15:14:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:14:46,297 INFO L93 Difference]: Finished difference Result 7680 states and 12662 transitions. [2020-10-13 15:14:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:14:46,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:14:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:14:46,309 INFO L225 Difference]: With dead ends: 7680 [2020-10-13 15:14:46,309 INFO L226 Difference]: Without dead ends: 5710 [2020-10-13 15:14:46,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:14:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5710 states. [2020-10-13 15:14:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5710 to 5704. [2020-10-13 15:14:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5704 states. [2020-10-13 15:14:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 9336 transitions. [2020-10-13 15:14:46,535 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 9336 transitions. Word has length 396 [2020-10-13 15:14:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:14:46,536 INFO L479 AbstractCegarLoop]: Abstraction has 5704 states and 9336 transitions. [2020-10-13 15:14:46,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:14:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 9336 transitions. [2020-10-13 15:14:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:14:46,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:14:46,546 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] [2020-10-13 15:14:46,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:14:46,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:14:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:14:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash -411476039, now seen corresponding path program 1 times [2020-10-13 15:14:46,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:14:46,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996563504] [2020-10-13 15:14:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:14:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:46,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:47,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:47,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:47,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:47,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:48,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:48,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:51,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:51,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:14:51,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:14:51,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 15:14:51,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:14:51,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 237 [2020-10-13 15:14:51,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:14:51,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:52,663 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:14:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:14:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:52,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:52,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:52,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:14:52,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:14:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:14:52,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:52,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:14:52,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:14:52,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:14:52,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:14:52,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996563504] [2020-10-13 15:14:52,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:14:52,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:14:52,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988572396] [2020-10-13 15:14:52,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:14:52,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:14:52,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:14:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:52,805 INFO L87 Difference]: Start difference. First operand 5704 states and 9336 transitions. Second operand 4 states. [2020-10-13 15:15:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:15:02,487 INFO L93 Difference]: Finished difference Result 7500 states and 12310 transitions. [2020-10-13 15:15:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:15:02,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:15:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:15:02,497 INFO L225 Difference]: With dead ends: 7500 [2020-10-13 15:15:02,497 INFO L226 Difference]: Without dead ends: 3306 [2020-10-13 15:15:02,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:15:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2020-10-13 15:15:02,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2940. [2020-10-13 15:15:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2940 states. [2020-10-13 15:15:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 4808 transitions. [2020-10-13 15:15:02,621 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 4808 transitions. Word has length 396 [2020-10-13 15:15:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:15:02,622 INFO L479 AbstractCegarLoop]: Abstraction has 2940 states and 4808 transitions. [2020-10-13 15:15:02,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:15:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 4808 transitions. [2020-10-13 15:15:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-13 15:15:02,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:15:02,629 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] [2020-10-13 15:15:02,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:15:02,629 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:15:02,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:15:02,630 INFO L82 PathProgramCache]: Analyzing trace with hash 342054553, now seen corresponding path program 1 times [2020-10-13 15:15:02,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:15:02,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114135199] [2020-10-13 15:15:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:15:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:15:02,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:03,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:03,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:03,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:03,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:04,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:04,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:04,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:05,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:07,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:07,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 407 [2020-10-13 15:15:07,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 15:15:07,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-13 15:15:07,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:07,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:15:07,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-13 15:15:07,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-13 15:15:07,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:08,743 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:15:08,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:15:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:15:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:08,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:08,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:15:08,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:15:08,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:15:08,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:15:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:15:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:15:08,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:15:08,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114135199] [2020-10-13 15:15:08,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:15:08,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:15:08,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943142078] [2020-10-13 15:15:08,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:15:08,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:15:08,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:15:08,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:15:08,941 INFO L87 Difference]: Start difference. First operand 2940 states and 4808 transitions. Second operand 4 states. [2020-10-13 15:15:09,715 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-10-13 15:15:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:15:18,893 INFO L93 Difference]: Finished difference Result 5040 states and 8286 transitions. [2020-10-13 15:15:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:15:18,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 401 [2020-10-13 15:15:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:15:18,903 INFO L225 Difference]: With dead ends: 5040 [2020-10-13 15:15:18,904 INFO L226 Difference]: Without dead ends: 4054 [2020-10-13 15:15:18,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:15:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2020-10-13 15:15:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4052. [2020-10-13 15:15:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4052 states. [2020-10-13 15:15:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 6624 transitions. [2020-10-13 15:15:19,088 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 6624 transitions. Word has length 401 [2020-10-13 15:15:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:15:19,090 INFO L479 AbstractCegarLoop]: Abstraction has 4052 states and 6624 transitions. [2020-10-13 15:15:19,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:15:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 6624 transitions. [2020-10-13 15:15:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-13 15:15:19,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:15:19,097 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] [2020-10-13 15:15:19,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:15:19,097 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:15:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:15:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1331719948, now seen corresponding path program 1 times [2020-10-13 15:15:19,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:15:19,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790663327] [2020-10-13 15:15:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:15:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:15:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:19,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:19,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:20,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:20,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:20,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:21,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:21,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:21,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:21,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:24,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:24,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-13 15:15:24,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:15:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 15:15:24,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:15:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 240 [2020-10-13 15:15:24,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-13 15:15:24,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:25,159 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:15:25,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:15:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:15:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:25,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:25,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:15:25,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:15:25,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:15:25,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:15:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:15:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:15:25,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:15:25,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790663327] [2020-10-13 15:15:25,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:15:25,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:15:25,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102283501] [2020-10-13 15:15:25,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:15:25,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:15:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:15:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:15:25,322 INFO L87 Difference]: Start difference. First operand 4052 states and 6624 transitions. Second operand 4 states. [2020-10-13 15:15:26,079 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-10-13 15:15:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:15:35,306 INFO L93 Difference]: Finished difference Result 8008 states and 13135 transitions. [2020-10-13 15:15:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:15:35,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 402 [2020-10-13 15:15:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:15:35,316 INFO L225 Difference]: With dead ends: 8008 [2020-10-13 15:15:35,316 INFO L226 Difference]: Without dead ends: 6142 [2020-10-13 15:15:35,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:15:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6142 states. [2020-10-13 15:15:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6142 to 6132. [2020-10-13 15:15:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6132 states. [2020-10-13 15:15:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 10021 transitions. [2020-10-13 15:15:35,557 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 10021 transitions. Word has length 402 [2020-10-13 15:15:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:15:35,557 INFO L479 AbstractCegarLoop]: Abstraction has 6132 states and 10021 transitions. [2020-10-13 15:15:35,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:15:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 10021 transitions. [2020-10-13 15:15:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-13 15:15:35,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:15:35,562 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] [2020-10-13 15:15:35,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:15:35,563 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:15:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:15:35,563 INFO L82 PathProgramCache]: Analyzing trace with hash -9378417, now seen corresponding path program 1 times [2020-10-13 15:15:35,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:15:35,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218555519] [2020-10-13 15:15:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:15:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:15:35,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:37,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:37,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:37,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:37,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:37,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:38,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:40,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:40,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-13 15:15:40,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:15:40,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 15:15:40,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:40,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:15:40,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:15:40,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-13 15:15:40,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:41,727 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:15:41,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:15:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:15:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:41,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:41,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:15:41,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:15:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 15:15:41,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:15:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:15:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:15:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:15:41,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218555519] [2020-10-13 15:15:41,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:15:41,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:15:41,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490175950] [2020-10-13 15:15:41,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:15:41,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:15:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:15:41,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:15:41,961 INFO L87 Difference]: Start difference. First operand 6132 states and 10021 transitions. Second operand 5 states.