/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:18:46,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:18:46,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:18:46,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:18:46,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:18:46,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:18:46,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:18:46,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:18:46,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:18:46,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:18:46,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:18:46,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:18:46,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:18:46,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:18:46,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:18:46,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:18:46,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:18:46,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:18:46,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:18:46,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:18:46,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:18:46,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:18:46,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:18:46,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:18:46,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:18:46,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:18:46,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:18:46,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:18:46,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:18:46,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:18:46,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:18:46,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:18:46,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:18:46,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:18:46,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:18:46,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:18:46,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:18:46,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:18:46,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:18:46,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:18:46,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:18:46,179 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 23:18:46,202 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:18:46,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:18:46,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:18:46,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:18:46,204 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:18:46,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:18:46,205 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:18:46,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:18:46,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:18:46,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:18:46,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:18:46,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:18:46,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:18:46,206 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:18:46,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:18:46,207 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:18:46,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:18:46,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:18:46,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:18:46,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:18:46,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:18:46,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:46,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:18:46,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:18:46,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:18:46,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:18:46,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:18:46,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:18:46,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:18:46,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:18:46,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:18:46,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:18:46,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:18:46,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:18:46,594 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:18:46,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-13 23:18:46,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57de406cf/f302d21992ab4b258a5b95cfc5fdd4d9/FLAGb24fa85c2 [2020-10-13 23:18:47,164 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:18:47,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-13 23:18:47,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57de406cf/f302d21992ab4b258a5b95cfc5fdd4d9/FLAGb24fa85c2 [2020-10-13 23:18:47,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57de406cf/f302d21992ab4b258a5b95cfc5fdd4d9 [2020-10-13 23:18:47,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:18:47,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:18:47,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:47,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:18:47,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:18:47,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:47,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbfc66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47, skipping insertion in model container [2020-10-13 23:18:47,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:47,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:18:47,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:18:47,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:47,823 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:18:47,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:47,879 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:18:47,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47 WrapperNode [2020-10-13 23:18:47,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:47,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:18:47,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:18:47,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:18:47,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:47,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:47,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:47,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:48,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:48,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:48,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (1/1) ... [2020-10-13 23:18:48,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:18:48,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:18:48,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:18:48,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:18:48,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (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 23:18:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:18:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:18:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:18:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:18:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:18:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:18:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:18:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:18:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:18:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-13 23:18:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:18:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:18:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:18:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:18:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:18:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:18:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:18:48,382 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:18:48,383 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 23:18:48,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:48 BoogieIcfgContainer [2020-10-13 23:18:48,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:18:48,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:18:48,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:18:48,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:18:48,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:18:47" (1/3) ... [2020-10-13 23:18:48,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333337e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:48, skipping insertion in model container [2020-10-13 23:18:48,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:47" (2/3) ... [2020-10-13 23:18:48,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333337e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:48, skipping insertion in model container [2020-10-13 23:18:48,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:48" (3/3) ... [2020-10-13 23:18:48,398 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2020-10-13 23:18:48,424 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:18:48,440 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:18:48,475 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:18:48,499 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:18:48,499 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:18:48,500 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:18:48,500 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:18:48,500 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:18:48,500 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:18:48,500 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:18:48,500 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:18:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-13 23:18:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:18:48,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:48,525 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] [2020-10-13 23:18:48,526 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:48,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1619448805, now seen corresponding path program 1 times [2020-10-13 23:18:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:48,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822224808] [2020-10-13 23:18:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:48,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:48,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:48,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:49,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:49,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:49,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:18:49,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:18:49,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-10-13 23:18:49,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:49,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:49,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:18:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:49,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:18:49,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:49,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:49,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:49,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:49,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:18:49,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:49,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:49,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:49,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:49,891 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 23:18:49,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822224808] [2020-10-13 23:18:49,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:49,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:18:49,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509914033] [2020-10-13 23:18:49,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:18:49,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:18:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:49,927 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-13 23:18:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:50,056 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-10-13 23:18:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:18:50,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-13 23:18:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:50,068 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:18:50,068 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:18:50,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:18:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:18:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:18:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 23:18:50,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-10-13 23:18:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:50,120 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 23:18:50,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:18:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 23:18:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:18:50,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:50,125 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] [2020-10-13 23:18:50,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:18:50,126 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1624989931, now seen corresponding path program 1 times [2020-10-13 23:18:50,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:50,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52508418] [2020-10-13 23:18:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:50,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:50,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:50,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:50,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:50,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:50,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:18:50,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:18:50,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-13 23:18:50,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:50,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:18:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:18:50,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:50,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:50,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:50,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:50,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:50,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:50,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:18:50,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:50,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:50,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:50,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:50,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:50,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:50,998 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 23:18:50,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52508418] [2020-10-13 23:18:51,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:51,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:18:51,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804817830] [2020-10-13 23:18:51,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:18:51,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:51,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:18:51,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:18:51,003 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-13 23:18:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:51,082 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 23:18:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:18:51,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 23:18:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:51,084 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:18:51,084 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:18:51,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:18:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:18:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 23:18:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:18:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 23:18:51,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-10-13 23:18:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:51,094 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 23:18:51,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:18:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 23:18:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:18:51,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:51,095 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] [2020-10-13 23:18:51,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:18:51,095 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1334881709, now seen corresponding path program 1 times [2020-10-13 23:18:51,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:51,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143368413] [2020-10-13 23:18:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:51,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:52,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:18:52,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:18:52,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-13 23:18:52,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:52,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:18:52,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:52,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:18:52,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:52,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:52,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:52,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:52,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:52,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:18:52,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:52,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:52,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:52,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:52,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:52,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:18:52,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143368413] [2020-10-13 23:18:52,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:52,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:18:52,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239677272] [2020-10-13 23:18:52,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:18:52,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:52,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:18:52,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:18:52,965 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-13 23:18:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:53,203 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-13 23:18:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:18:53,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:18:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:53,205 INFO L225 Difference]: With dead ends: 39 [2020-10-13 23:18:53,205 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:18:53,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:18:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:18:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:18:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:18:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-13 23:18:53,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2020-10-13 23:18:53,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:53,224 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-13 23:18:53,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:18:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-13 23:18:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:18:53,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:53,226 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] [2020-10-13 23:18:53,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:18:53,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:53,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1903915759, now seen corresponding path program 1 times [2020-10-13 23:18:53,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:53,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465946133] [2020-10-13 23:18:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:53,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:55,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:18:55,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:18:55,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2441 [2020-10-13 23:18:55,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:55,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:55,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:18:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:18:55,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:18:55,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:55,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:55,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:55,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:55,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:18:55,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:55,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:55,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:55,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:18:55,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465946133] [2020-10-13 23:18:55,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:18:55,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:18:55,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853608320] [2020-10-13 23:18:55,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:18:55,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:18:55,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:18:55,825 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2020-10-13 23:18:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:56,070 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-10-13 23:18:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:18:56,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 23:18:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:56,072 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:18:56,072 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:18:56,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:18:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:18:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 23:18:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:18:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-13 23:18:56,087 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 24 [2020-10-13 23:18:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:56,088 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-13 23:18:56,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:18:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-13 23:18:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:18:56,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:56,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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 23:18:56,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:18:56,091 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:56,091 INFO L82 PathProgramCache]: Analyzing trace with hash 719567171, now seen corresponding path program 1 times [2020-10-13 23:18:56,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:56,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232565241] [2020-10-13 23:18:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:59,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:01,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:19:01,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:19:01,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:19:01,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:01,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:01,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:19:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:19:01,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:19:01,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:01,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:01,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:01,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:01,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:01,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:01,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:01,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:01,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:19:01,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232565241] [2020-10-13 23:19:01,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:01,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:19:01,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994452017] [2020-10-13 23:19:01,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:19:01,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:19:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:01,202 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-10-13 23:19:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:01,357 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 23:19:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:19:01,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-13 23:19:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:01,360 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:19:01,360 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:19:01,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:19:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 23:19:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:19:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 23:19:01,380 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2020-10-13 23:19:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:01,381 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 23:19:01,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:19:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 23:19:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:19:01,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:01,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:01,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:19:01,390 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash 793467137, now seen corresponding path program 2 times [2020-10-13 23:19:01,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:01,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751488136] [2020-10-13 23:19:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:01,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:03,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:06,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:19:06,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:19:06,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 23:19:06,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:06,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:19:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:19:06,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:07,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:07,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:07,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:07,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:07,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:07,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:07,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:07,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751488136] [2020-10-13 23:19:07,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:07,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:19:07,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715559253] [2020-10-13 23:19:07,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:19:07,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:19:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:19:07,287 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 17 states. [2020-10-13 23:19:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:07,666 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-13 23:19:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:19:07,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 23:19:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:07,668 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:19:07,668 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:19:07,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:19:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:19:07,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-13 23:19:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:19:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-13 23:19:07,678 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2020-10-13 23:19:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:07,678 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-13 23:19:07,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:19:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-13 23:19:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:19:07,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:07,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:07,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:19:07,680 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash -965107649, now seen corresponding path program 3 times [2020-10-13 23:19:07,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:07,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203419177] [2020-10-13 23:19:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:07,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:12,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:19:12,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:12,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:19:12,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:12,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:12,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:12,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:12,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:19:12,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:12,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:12,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:12,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:12,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:12,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:12,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:12,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:12,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:12,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:12,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:12,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:19:12,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203419177] [2020-10-13 23:19:12,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:12,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:12,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254807190] [2020-10-13 23:19:12,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:12,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:12,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:12,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:12,791 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 10 states. [2020-10-13 23:19:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:13,051 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-13 23:19:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:19:13,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 23:19:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:13,053 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:19:13,053 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:19:13,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:19:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:19:13,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 23:19:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:19:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-13 23:19:13,062 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 42 [2020-10-13 23:19:13,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:13,063 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-13 23:19:13,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-13 23:19:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:19:13,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:13,064 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:13,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:19:13,064 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash 175059197, now seen corresponding path program 4 times [2020-10-13 23:19:13,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:13,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548747352] [2020-10-13 23:19:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:13,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:18,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:19:18,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:19:18,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:18,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:18,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:18,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:18,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:19:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:18,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:18,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:18,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:18,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:18,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:18,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:18,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 23:19:18,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548747352] [2020-10-13 23:19:18,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:18,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:18,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110894553] [2020-10-13 23:19:18,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:18,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:18,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:18,168 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 10 states. [2020-10-13 23:19:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:18,405 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-10-13 23:19:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:19:18,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 23:19:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:18,407 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:19:18,407 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:19:18,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:19:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:19:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 23:19:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:19:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-13 23:19:18,418 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2020-10-13 23:19:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:18,419 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-13 23:19:18,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-13 23:19:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:19:18,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:18,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:18,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:19:18,421 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash -41413449, now seen corresponding path program 5 times [2020-10-13 23:19:18,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:18,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271465865] [2020-10-13 23:19:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:18,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:22,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:22,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:23,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:23,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:19:23,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:19:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:19:23,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:23,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:19:23,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:24,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:24,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:24,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:24,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:24,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:24,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:24,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:24,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:19:24,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271465865] [2020-10-13 23:19:24,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:24,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:19:24,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081929102] [2020-10-13 23:19:24,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:19:24,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:24,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:19:24,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:19:24,122 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 22 states. [2020-10-13 23:19:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:24,935 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-10-13 23:19:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:19:24,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-13 23:19:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:24,938 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:19:24,938 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:19:24,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:19:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:19:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-13 23:19:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:19:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-13 23:19:24,950 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2020-10-13 23:19:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:24,950 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-13 23:19:24,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:19:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-13 23:19:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:19:24,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:24,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:24,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:19:24,952 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:24,952 INFO L82 PathProgramCache]: Analyzing trace with hash -126466443, now seen corresponding path program 6 times [2020-10-13 23:19:24,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:24,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886202356] [2020-10-13 23:19:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:24,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:29,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:29,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:19:29,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:29,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:29,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:29,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:29,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:19:29,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:30,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:30,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:30,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:30,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:30,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:30,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:30,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:30,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:30,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:30,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:19:30,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886202356] [2020-10-13 23:19:30,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:30,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:30,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449471207] [2020-10-13 23:19:30,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:30,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:30,089 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 12 states. [2020-10-13 23:19:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:30,455 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2020-10-13 23:19:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:19:30,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 23:19:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:30,457 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:19:30,457 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:19:30,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:19:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 23:19:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:19:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-13 23:19:30,468 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 52 [2020-10-13 23:19:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:30,469 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-13 23:19:30,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-13 23:19:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:19:30,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:30,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:30,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:19:30,470 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1267433037, now seen corresponding path program 7 times [2020-10-13 23:19:30,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:30,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189163299] [2020-10-13 23:19:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:30,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:35,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:35,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:19:35,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:19:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:19:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:35,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:19:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:35,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:35,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:35,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:35,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:35,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:35,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:35,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:35,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 23:19:35,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189163299] [2020-10-13 23:19:35,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:35,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:35,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402031043] [2020-10-13 23:19:35,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:35,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:35,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:35,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:35,602 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 12 states. [2020-10-13 23:19:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:35,962 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-13 23:19:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:19:35,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-13 23:19:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:35,963 INFO L225 Difference]: With dead ends: 103 [2020-10-13 23:19:35,963 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:19:35,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:19:35,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 23:19:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:19:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-13 23:19:35,975 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2020-10-13 23:19:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:35,975 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-13 23:19:35,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-13 23:19:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:19:35,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:35,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:35,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:19:35,977 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1807162131, now seen corresponding path program 8 times [2020-10-13 23:19:35,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:35,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046436974] [2020-10-13 23:19:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:36,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:36,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:36,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:40,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:41,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:41,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:19:41,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:19:41,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:19:41,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:41,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:19:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:19:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:44,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:44,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:44,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:44,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:44,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:44,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:44,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:44,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:44,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:44,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:44,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046436974] [2020-10-13 23:19:44,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:44,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:19:44,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221115782] [2020-10-13 23:19:44,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:19:44,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:19:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:19:44,371 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 43 states. [2020-10-13 23:19:44,697 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-13 23:19:46,560 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-10-13 23:19:46,864 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2020-10-13 23:19:47,157 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 38 [2020-10-13 23:19:47,761 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2020-10-13 23:19:48,021 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 53 [2020-10-13 23:19:48,462 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-13 23:19:48,865 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-13 23:19:49,093 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 37 [2020-10-13 23:19:50,236 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-13 23:19:50,456 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 23:19:52,311 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-13 23:19:52,580 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-13 23:19:53,227 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-10-13 23:19:53,691 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-13 23:19:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:54,962 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2020-10-13 23:19:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 23:19:54,962 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 60 [2020-10-13 23:19:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:54,963 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:19:54,964 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 23:19:54,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=664, Invalid=6646, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 23:19:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 23:19:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 118. [2020-10-13 23:19:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:19:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2020-10-13 23:19:54,991 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 60 [2020-10-13 23:19:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:54,991 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2020-10-13 23:19:54,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:19:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2020-10-13 23:19:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:19:54,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:54,994 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:54,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:19:54,994 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash -498867925, now seen corresponding path program 9 times [2020-10-13 23:19:54,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:54,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935776540] [2020-10-13 23:19:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:55,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:00,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:20:00,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:00,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:20:00,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:00,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:00,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:00,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:20:00,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:00,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:00,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:00,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:00,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:00,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:00,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:00,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:00,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:20:00,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935776540] [2020-10-13 23:20:00,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:00,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:00,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581559832] [2020-10-13 23:20:00,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:00,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:00,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:00,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:00,154 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 14 states. [2020-10-13 23:20:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:00,607 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2020-10-13 23:20:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:20:00,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 23:20:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:00,610 INFO L225 Difference]: With dead ends: 168 [2020-10-13 23:20:00,610 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:20:00,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:20:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:20:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 23:20:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:20:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-13 23:20:00,634 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 62 [2020-10-13 23:20:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:00,634 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-13 23:20:00,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-13 23:20:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:20:00,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:00,639 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:00,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:20:00,639 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:00,640 INFO L82 PathProgramCache]: Analyzing trace with hash -44587287, now seen corresponding path program 10 times [2020-10-13 23:20:00,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:00,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458166029] [2020-10-13 23:20:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:00,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:05,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:05,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:05,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:20:05,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:20:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:20:05,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:05,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:05,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:20:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:20:05,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:05,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:05,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:05,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:05,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:05,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:05,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:05,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:05,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 23:20:05,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458166029] [2020-10-13 23:20:05,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:05,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:05,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254540047] [2020-10-13 23:20:05,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:05,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:05,910 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 14 states. [2020-10-13 23:20:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:06,538 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2020-10-13 23:20:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:20:06,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-13 23:20:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:06,541 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:20:06,541 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:20:06,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:20:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:20:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 23:20:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:20:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-13 23:20:06,573 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2020-10-13 23:20:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:06,574 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-13 23:20:06,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-13 23:20:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:20:06,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:06,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:06,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:20:06,576 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1034299811, now seen corresponding path program 11 times [2020-10-13 23:20:06,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:06,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236005427] [2020-10-13 23:20:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:06,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:08,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:11,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:20:11,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:20:11,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:20:11,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:11,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 23:20:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:20:11,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:13,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:13,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:13,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:13,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:13,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:13,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:13,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:13,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:20:13,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236005427] [2020-10-13 23:20:13,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:13,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:20:13,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119833244] [2020-10-13 23:20:13,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:20:13,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:20:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1395, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:20:13,865 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 39 states. [2020-10-13 23:20:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:17,576 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-10-13 23:20:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:20:17,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 70 [2020-10-13 23:20:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:17,578 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:20:17,578 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:20:17,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=203, Invalid=3219, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 23:20:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:20:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-10-13 23:20:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:20:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-13 23:20:17,591 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2020-10-13 23:20:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:17,591 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-13 23:20:17,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:20:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-13 23:20:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:20:17,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:17,592 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:17,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:20:17,592 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:17,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1453141919, now seen corresponding path program 12 times [2020-10-13 23:20:17,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:17,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419466634] [2020-10-13 23:20:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:17,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:17,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:17,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:22,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:22,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:20:22,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:22,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:20:22,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:22,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:22,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:20:22,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:22,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:20:22,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:22,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:22,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:22,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:22,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:22,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:22,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:22,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:22,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:22,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:22,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 23:20:22,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419466634] [2020-10-13 23:20:22,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:22,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:20:22,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567454176] [2020-10-13 23:20:22,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:20:22,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:22,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:20:22,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:20:22,852 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 16 states. [2020-10-13 23:20:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:23,707 INFO L93 Difference]: Finished difference Result 194 states and 208 transitions. [2020-10-13 23:20:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:20:23,708 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 23:20:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:23,710 INFO L225 Difference]: With dead ends: 194 [2020-10-13 23:20:23,710 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:20:23,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:20:23,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:20:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 23:20:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:20:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-13 23:20:23,726 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 72 [2020-10-13 23:20:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:23,726 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-13 23:20:23,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:20:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-13 23:20:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:20:23,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:23,728 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:23,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:20:23,729 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash -939458401, now seen corresponding path program 13 times [2020-10-13 23:20:23,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:23,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098049223] [2020-10-13 23:20:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:23,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:23,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:23,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:28,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:20:28,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:28,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:20:28,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:28,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:28,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:20:28,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:28,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:20:28,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:28,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:28,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:28,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:28,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:28,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:28,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:28,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-13 23:20:28,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098049223] [2020-10-13 23:20:28,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:28,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:20:28,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599047211] [2020-10-13 23:20:28,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:20:28,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:28,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:20:28,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:20:28,964 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 16 states. [2020-10-13 23:20:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:29,532 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2020-10-13 23:20:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:20:29,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-13 23:20:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:29,534 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:20:29,534 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:20:29,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:20:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:20:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 23:20:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:20:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-13 23:20:29,543 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2020-10-13 23:20:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:29,543 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-13 23:20:29,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:20:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-13 23:20:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:20:29,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:29,544 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:29,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:20:29,544 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1455440601, now seen corresponding path program 14 times [2020-10-13 23:20:29,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:29,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201364493] [2020-10-13 23:20:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:29,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:30,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:33,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:34,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:34,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:34,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:20:34,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:34,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5244 [2020-10-13 23:20:34,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:34,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:34,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 23:20:34,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:34,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 23:20:34,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:37,387 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-13 23:20:37,596 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 23:20:37,809 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 23:20:38,040 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-13 23:20:38,258 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-13 23:20:38,511 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-13 23:20:38,924 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-13 23:20:41,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:41,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:41,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:41,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:41,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:41,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:41,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:41,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:41,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201364493] [2020-10-13 23:20:41,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:41,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 23:20:41,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933705007] [2020-10-13 23:20:41,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 23:20:41,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 23:20:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3455, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 23:20:41,988 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 62 states. [2020-10-13 23:20:42,514 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 15 [2020-10-13 23:20:44,419 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-13 23:20:44,885 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-13 23:20:45,324 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2020-10-13 23:20:45,704 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 61 [2020-10-13 23:20:46,125 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 76 [2020-10-13 23:20:46,581 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 77 [2020-10-13 23:20:47,042 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2020-10-13 23:20:47,601 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 95 [2020-10-13 23:20:48,117 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 90 [2020-10-13 23:20:48,524 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-13 23:20:50,037 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2020-10-13 23:20:50,449 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-13 23:20:50,824 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-13 23:20:51,356 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-13 23:20:51,714 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 59 [2020-10-13 23:20:52,156 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2020-10-13 23:20:52,601 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 57 [2020-10-13 23:20:53,101 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-10-13 23:20:53,622 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 77 [2020-10-13 23:20:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:56,289 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2020-10-13 23:20:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 23:20:56,290 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-10-13 23:20:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:56,291 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:20:56,291 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:20:56,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=971, Invalid=8535, Unknown=0, NotChecked=0, Total=9506 [2020-10-13 23:20:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:20:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 23:20:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:20:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-13 23:20:56,303 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 80 [2020-10-13 23:20:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:56,303 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-13 23:20:56,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 23:20:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-13 23:20:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:20:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:56,304 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:56,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:20:56,305 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1262398185, now seen corresponding path program 15 times [2020-10-13 23:20:56,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:56,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725534335] [2020-10-13 23:20:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:56,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:01,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:01,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:21:01,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:21:01,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:21:01,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:01,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:21:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:01,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:21:01,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:01,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:01,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:01,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:01,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:01,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:01,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:01,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:01,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 23:21:01,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725534335] [2020-10-13 23:21:01,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:01,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:21:01,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271105507] [2020-10-13 23:21:01,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:21:01,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:01,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:21:01,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:21:01,558 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 18 states. [2020-10-13 23:21:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:02,266 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2020-10-13 23:21:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:21:02,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-13 23:21:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:02,268 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:21:02,268 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:21:02,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:21:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:21:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 23:21:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:21:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-13 23:21:02,278 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-13 23:21:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:02,278 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-13 23:21:02,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:21:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-13 23:21:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:21:02,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:02,279 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:02,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:21:02,280 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1514172273, now seen corresponding path program 16 times [2020-10-13 23:21:02,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:02,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486578668] [2020-10-13 23:21:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:02,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:03,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:07,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 23:21:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:09,421 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-13 23:21:09,630 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-13 23:21:09,855 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-13 23:21:10,070 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-13 23:21:10,281 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-13 23:21:10,736 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-13 23:21:10,971 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-13 23:21:11,682 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-13 23:21:11,936 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-13 23:21:12,240 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-13 23:21:12,531 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-13 23:21:12,809 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-13 23:21:13,096 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-13 23:21:13,404 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-13 23:21:13,717 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-13 23:21:14,017 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 23:21:14,320 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-13 23:21:14,643 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-13 23:21:14,948 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-13 23:21:19,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:19,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:19,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:19,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:19,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:19,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:19,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:19,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:19,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:19,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:19,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:19,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 36 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:21:19,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486578668] [2020-10-13 23:21:19,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:19,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 23:21:19,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318981588] [2020-10-13 23:21:19,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 23:21:19,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 23:21:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=4676, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 23:21:19,434 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 71 states. [2020-10-13 23:21:19,903 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 3 [2020-10-13 23:21:20,401 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 15 [2020-10-13 23:21:22,316 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-13 23:21:22,717 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-13 23:21:23,099 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-13 23:21:23,823 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-13 23:21:24,164 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-13 23:21:24,778 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-13 23:21:25,310 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-13 23:21:25,899 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-13 23:21:26,402 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-13 23:21:26,993 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-13 23:21:27,437 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 23:21:27,828 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 23:21:28,241 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-13 23:21:28,658 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 23:21:29,079 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 23:21:29,445 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-13 23:21:29,824 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 23:21:30,205 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-13 23:21:30,595 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 23:21:30,984 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-13 23:21:31,404 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 23:21:31,821 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-13 23:21:32,530 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-13 23:21:33,035 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-13 23:21:33,411 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-13 23:21:34,754 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-13 23:21:35,457 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-13 23:21:35,787 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-13 23:21:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:38,333 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2020-10-13 23:21:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-13 23:21:38,341 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 90 [2020-10-13 23:21:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:38,343 INFO L225 Difference]: With dead ends: 166 [2020-10-13 23:21:38,343 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 23:21:38,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=732, Invalid=11700, Unknown=0, NotChecked=0, Total=12432 [2020-10-13 23:21:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 23:21:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2020-10-13 23:21:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 23:21:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-13 23:21:38,370 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 90 [2020-10-13 23:21:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:38,371 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-13 23:21:38,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 23:21:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-13 23:21:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:21:38,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:38,372 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:38,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:21:38,373 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1891511373, now seen corresponding path program 17 times [2020-10-13 23:21:38,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:38,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962550692] [2020-10-13 23:21:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:38,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:38,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:43,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:21:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:44,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:44,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:44,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:44,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:44,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:44,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:44,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:44,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:44,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:44,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:44,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:21:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:21:44,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962550692] [2020-10-13 23:21:44,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:44,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:21:44,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854225650] [2020-10-13 23:21:44,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:21:44,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:21:44,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:21:44,042 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 20 states. [2020-10-13 23:21:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:45,332 INFO L93 Difference]: Finished difference Result 234 states and 247 transitions. [2020-10-13 23:21:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:21:45,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 23:21:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:45,335 INFO L225 Difference]: With dead ends: 234 [2020-10-13 23:21:45,335 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:21:45,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:21:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:21:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-13 23:21:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:21:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-13 23:21:45,343 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 92 [2020-10-13 23:21:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:45,343 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-13 23:21:45,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:21:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-13 23:21:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:21:45,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:45,344 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:45,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:21:45,345 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1517645133, now seen corresponding path program 18 times [2020-10-13 23:21:45,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:45,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405936219] [2020-10-13 23:21:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:45,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:45,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:50,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:50,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:21:50,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:21:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:21:50,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:50,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:21:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:50,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:21:50,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:50,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:50,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:50,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:50,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:21:50,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405936219] [2020-10-13 23:21:50,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:50,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:21:50,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626755152] [2020-10-13 23:21:50,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:21:50,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:21:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:21:50,761 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 20 states. [2020-10-13 23:21:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:51,773 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2020-10-13 23:21:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:21:51,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 23:21:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:51,779 INFO L225 Difference]: With dead ends: 154 [2020-10-13 23:21:51,779 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:21:51,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:21:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:21:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 23:21:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:21:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-13 23:21:51,790 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-13 23:21:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:51,790 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-13 23:21:51,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:21:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-13 23:21:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:21:51,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:51,792 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:51,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:21:51,792 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 802452165, now seen corresponding path program 19 times [2020-10-13 23:21:51,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:51,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933599607] [2020-10-13 23:21:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:56,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:56,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:21:56,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:56,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:21:56,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:56,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 23:21:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:21:56,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:07,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:07,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:22:07,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933599607] [2020-10-13 23:22:07,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:07,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 23:22:07,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442753747] [2020-10-13 23:22:07,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 23:22:07,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:07,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 23:22:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4255, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 23:22:07,567 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 67 states. [2020-10-13 23:22:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:19,012 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2020-10-13 23:22:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:22:19,014 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 100 [2020-10-13 23:22:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:19,015 INFO L225 Difference]: With dead ends: 162 [2020-10-13 23:22:19,015 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:22:19,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=177, Invalid=4515, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 23:22:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:22:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2020-10-13 23:22:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:22:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2020-10-13 23:22:19,029 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 100 [2020-10-13 23:22:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:19,030 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2020-10-13 23:22:19,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 23:22:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2020-10-13 23:22:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:22:19,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:19,031 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:19,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:22:19,032 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -920430333, now seen corresponding path program 20 times [2020-10-13 23:22:19,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:19,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664453457] [2020-10-13 23:22:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:19,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:21,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:24,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:24,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:22:24,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:22:24,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:22:24,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:24,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:22:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 23:22:24,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:24,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:24,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:24,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:24,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:24,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:24,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:22:24,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:24,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:24,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-13 23:22:24,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664453457] [2020-10-13 23:22:24,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:24,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:22:24,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566920891] [2020-10-13 23:22:24,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:22:24,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:24,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:22:24,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:22:24,637 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 22 states. [2020-10-13 23:22:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:26,820 INFO L93 Difference]: Finished difference Result 278 states and 292 transitions. [2020-10-13 23:22:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:22:26,823 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-10-13 23:22:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:26,824 INFO L225 Difference]: With dead ends: 278 [2020-10-13 23:22:26,825 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:22:26,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:22:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:22:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-13 23:22:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 23:22:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-13 23:22:26,842 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 102 [2020-10-13 23:22:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:26,842 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-13 23:22:26,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:22:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-13 23:22:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:22:26,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:26,843 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:26,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:22:26,843 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:26,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1255274303, now seen corresponding path program 21 times [2020-10-13 23:22:26,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:26,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126284620] [2020-10-13 23:22:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:26,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:26,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:27,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking...