/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-examples/standard_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:30:38,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:30:38,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:30:38,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:30:38,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:30:38,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:30:38,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:30:38,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:30:38,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:30:38,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:30:38,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:30:38,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:30:38,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:30:38,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:30:38,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:30:38,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:30:38,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:30:38,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:30:38,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:30:38,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:30:38,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:30:38,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:30:38,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:30:38,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:30:38,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:30:38,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:30:38,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:30:38,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:30:38,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:30:38,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:30:38,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:30:38,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:30:38,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:30:38,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:30:38,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:30:38,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:30:38,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:30:38,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:30:38,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:30:38,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:30:38,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:30:38,217 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 23:30:38,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:30:38,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:30:38,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:30:38,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:30:38,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:30:38,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:30:38,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:30:38,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:30:38,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:30:38,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:30:38,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:30:38,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:30:38,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:30:38,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:30:38,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:30:38,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:30:38,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:30:38,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:30:38,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:30:38,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:30:38,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:30:38,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:38,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:30:38,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:30:38,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:30:38,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:30:38,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:30:38,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:30:38,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:30:38,250 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 23:30:38,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:30:38,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:30:38,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:30:38,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:30:38,619 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:30:38,620 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-13 23:30:38,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87138de9d/f7ba696ed5d84613954f47e7d8534aa6/FLAG8326ab592 [2020-10-13 23:30:39,150 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:30:39,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-13 23:30:39,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87138de9d/f7ba696ed5d84613954f47e7d8534aa6/FLAG8326ab592 [2020-10-13 23:30:39,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87138de9d/f7ba696ed5d84613954f47e7d8534aa6 [2020-10-13 23:30:39,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:30:39,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:30:39,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:39,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:30:39,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:30:39,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27030054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39, skipping insertion in model container [2020-10-13 23:30:39,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:30:39,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:30:39,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:39,762 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:30:39,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:39,814 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:30:39,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39 WrapperNode [2020-10-13 23:30:39,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:39,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:30:39,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:30:39,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:30:39,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (1/1) ... [2020-10-13 23:30:39,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:30:39,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:30:39,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:30:39,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:30:39,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (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 23:30:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:30:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:30:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:30:40,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:30:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:30:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:30:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:30:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:30:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:30:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:30:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:30:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:30:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:30:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:30:40,515 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:30:40,516 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 23:30:40,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:40 BoogieIcfgContainer [2020-10-13 23:30:40,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:30:40,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:30:40,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:30:40,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:30:40,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:30:39" (1/3) ... [2020-10-13 23:30:40,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a158b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:40, skipping insertion in model container [2020-10-13 23:30:40,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:39" (2/3) ... [2020-10-13 23:30:40,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a158b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:40, skipping insertion in model container [2020-10-13 23:30:40,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:40" (3/3) ... [2020-10-13 23:30:40,529 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2020-10-13 23:30:40,541 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:30:40,548 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:30:40,561 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:30:40,586 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:30:40,587 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:30:40,587 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:30:40,587 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:30:40,587 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:30:40,587 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:30:40,588 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:30:40,588 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:30:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 23:30:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:30:40,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:40,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:40,617 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2020-10-13 23:30:40,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:40,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135011836] [2020-10-13 23:30:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:40,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:40,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:40,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:42,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:42,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:30:42,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:30:42,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-13 23:30:42,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:42,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:42,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:42,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:30:42,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:42,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:42,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:42,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:42,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:42,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:42,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:42,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:30:42,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:42,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:42,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:42,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:42,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:42,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:42,884 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 23:30:42,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135011836] [2020-10-13 23:30:42,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:42,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:30:42,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442790311] [2020-10-13 23:30:42,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:30:42,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:30:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:42,913 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 23:30:43,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:43,059 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2020-10-13 23:30:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:30:43,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-13 23:30:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:43,072 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:30:43,073 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:30:43,077 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 23:30:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:30:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:30:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:30:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-13 23:30:43,129 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-13 23:30:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:43,129 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-13 23:30:43,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:30:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-13 23:30:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:30:43,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:43,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:43,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:30:43,132 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:43,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2073025378, now seen corresponding path program 1 times [2020-10-13 23:30:43,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:43,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024912438] [2020-10-13 23:30:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:43,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:47,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:30:47,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:30:47,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4637 [2020-10-13 23:30:47,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:47,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:30:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:47,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:30:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:47,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:47,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:47,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:47,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:47,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:47,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:47,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:47,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:47,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:47,839 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 23:30:47,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024912438] [2020-10-13 23:30:47,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:47,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:47,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639811164] [2020-10-13 23:30:47,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:47,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:47,849 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-10-13 23:30:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:48,105 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-10-13 23:30:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:48,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 23:30:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:48,107 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:30:48,107 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:30:48,110 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 23:30:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:30:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-13 23:30:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:30:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-13 23:30:48,130 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2020-10-13 23:30:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:48,130 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-13 23:30:48,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-13 23:30:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:30:48,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:48,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:48,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:30:48,134 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:48,135 INFO L82 PathProgramCache]: Analyzing trace with hash -864373520, now seen corresponding path program 1 times [2020-10-13 23:30:48,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:48,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082140666] [2020-10-13 23:30:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:53,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:30:53,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:30:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:30:53,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:53,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:53,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:53,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:53,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:53,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:53,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:53,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:30:53,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:53,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:53,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:53,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:53,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:53,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:30:53,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082140666] [2020-10-13 23:30:53,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:53,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:53,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309005026] [2020-10-13 23:30:53,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:53,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:53,221 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 4 states. [2020-10-13 23:30:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:53,343 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-10-13 23:30:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:53,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 23:30:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:53,345 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:30:53,345 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:30:53,346 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 23:30:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:30:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 23:30:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:30:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-13 23:30:53,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 41 [2020-10-13 23:30:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:53,354 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-13 23:30:53,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-13 23:30:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:30:53,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:53,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:53,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:30:53,357 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1132383374, now seen corresponding path program 1 times [2020-10-13 23:30:53,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:53,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524179304] [2020-10-13 23:30:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:53,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:58,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:30:58,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:30:58,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:30:58,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:58,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:58,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:30:58,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:30:58,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:30:58,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:58,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:58,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:58,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:58,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:58,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:58,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:58,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:58,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:30:58,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524179304] [2020-10-13 23:30:58,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:58,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:30:58,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111310053] [2020-10-13 23:30:58,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:30:58,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:58,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:30:58,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:58,431 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2020-10-13 23:30:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:58,652 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2020-10-13 23:30:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:30:58,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-13 23:30:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:58,654 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:30:58,654 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:30:58,655 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 23:30:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:30:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-13 23:30:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:30:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-13 23:30:58,664 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 43 [2020-10-13 23:30:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:58,665 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-13 23:30:58,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:30:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-13 23:30:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:30:58,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:58,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:58,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:30:58,667 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:58,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1502689504, now seen corresponding path program 2 times [2020-10-13 23:30:58,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:58,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622768866] [2020-10-13 23:30:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:58,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:03,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:31:03,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:03,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:31:03,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:03,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:31:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:03,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:03,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:03,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:03,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:03,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:03,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:03,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:03,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:03,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:03,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:31:03,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622768866] [2020-10-13 23:31:03,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:03,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:03,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636315539] [2020-10-13 23:31:03,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:03,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:03,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:03,752 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 6 states. [2020-10-13 23:31:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:04,003 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2020-10-13 23:31:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:04,004 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 23:31:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:04,005 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:31:04,006 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:31:04,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:31:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-13 23:31:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:31:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-13 23:31:04,029 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 57 [2020-10-13 23:31:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:04,030 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-13 23:31:04,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-13 23:31:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:31:04,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:04,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:04,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:31:04,035 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2060660146, now seen corresponding path program 3 times [2020-10-13 23:31:04,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:04,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761552785] [2020-10-13 23:31:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:09,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:31:09,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:09,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:31:09,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:09,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:09,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:09,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:09,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:09,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:09,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:09,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:09,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:09,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:09,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:09,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:09,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:09,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:09,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:31:09,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761552785] [2020-10-13 23:31:09,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:09,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:09,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122357185] [2020-10-13 23:31:09,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:09,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:09,124 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 5 states. [2020-10-13 23:31:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:09,231 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-10-13 23:31:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:09,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-13 23:31:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:09,233 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:31:09,233 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:31:09,234 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 23:31:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:31:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 23:31:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:31:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-10-13 23:31:09,248 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 71 [2020-10-13 23:31:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:09,250 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-10-13 23:31:09,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-10-13 23:31:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:31:09,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:09,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 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 23:31:09,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:31:09,253 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1535075120, now seen corresponding path program 4 times [2020-10-13 23:31:09,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:09,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712534469] [2020-10-13 23:31:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:14,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:31:14,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:14,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:31:14,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:14,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:31:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:14,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:14,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:14,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:14,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:14,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:14,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:14,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:14,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:14,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:14,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:14,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-13 23:31:14,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712534469] [2020-10-13 23:31:14,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:14,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:14,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237928329] [2020-10-13 23:31:14,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:14,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:14,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:14,341 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 7 states. [2020-10-13 23:31:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:14,586 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2020-10-13 23:31:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:14,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-13 23:31:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:14,588 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:31:14,588 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:31:14,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:31:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-10-13 23:31:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:31:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2020-10-13 23:31:14,597 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 73 [2020-10-13 23:31:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:14,597 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2020-10-13 23:31:14,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2020-10-13 23:31:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:31:14,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:14,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 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 23:31:14,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:31:14,599 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1208914526, now seen corresponding path program 5 times [2020-10-13 23:31:14,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:14,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491145453] [2020-10-13 23:31:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:14,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:19,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:31:19,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:19,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:31:19,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:19,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:19,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:19,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:19,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:19,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:19,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:19,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:19,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:19,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:19,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:19,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:31:19,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491145453] [2020-10-13 23:31:19,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:19,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:19,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495525856] [2020-10-13 23:31:19,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:19,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:19,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:19,679 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 6 states. [2020-10-13 23:31:19,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:19,803 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2020-10-13 23:31:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:19,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 23:31:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:19,805 INFO L225 Difference]: With dead ends: 176 [2020-10-13 23:31:19,805 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:31:19,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:31:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 23:31:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:31:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2020-10-13 23:31:19,823 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 87 [2020-10-13 23:31:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:19,824 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2020-10-13 23:31:19,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2020-10-13 23:31:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:31:19,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:19,825 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 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 23:31:19,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:31:19,826 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 46719168, now seen corresponding path program 6 times [2020-10-13 23:31:19,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:19,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930572831] [2020-10-13 23:31:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:24,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:31:24,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:24,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:31:24,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:24,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:31:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:24,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:24,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:24,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:24,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:24,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:24,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:24,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 23:31:24,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930572831] [2020-10-13 23:31:24,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:24,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:24,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295471780] [2020-10-13 23:31:24,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:24,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:24,946 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand 8 states. [2020-10-13 23:31:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:25,185 INFO L93 Difference]: Finished difference Result 186 states and 207 transitions. [2020-10-13 23:31:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:25,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-13 23:31:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:25,187 INFO L225 Difference]: With dead ends: 186 [2020-10-13 23:31:25,187 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:31:25,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:31:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2020-10-13 23:31:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:31:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-10-13 23:31:25,207 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 89 [2020-10-13 23:31:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:25,207 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-10-13 23:31:25,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-10-13 23:31:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:31:25,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:25,212 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 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 23:31:25,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:31:25,212 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1315999122, now seen corresponding path program 7 times [2020-10-13 23:31:25,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:25,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416029299] [2020-10-13 23:31:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:27,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:30,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:31:30,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:31:30,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:30,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:31:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:30,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:30,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:30,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:30,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:30,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:30,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:30,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:30,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:30,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:30,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:30,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:30,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-13 23:31:30,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416029299] [2020-10-13 23:31:30,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:30,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:30,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830578272] [2020-10-13 23:31:30,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:30,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:30,358 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 9 states. [2020-10-13 23:31:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:30,711 INFO L93 Difference]: Finished difference Result 212 states and 233 transitions. [2020-10-13 23:31:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:30,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2020-10-13 23:31:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:30,713 INFO L225 Difference]: With dead ends: 212 [2020-10-13 23:31:30,713 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:31:30,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:31:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2020-10-13 23:31:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:31:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2020-10-13 23:31:30,728 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 103 [2020-10-13 23:31:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:30,730 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2020-10-13 23:31:30,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2020-10-13 23:31:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:31:30,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:30,734 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 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 23:31:30,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:31:30,734 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:30,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:30,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1912806684, now seen corresponding path program 8 times [2020-10-13 23:31:30,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:30,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084601432] [2020-10-13 23:31:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:35,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:35,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:35,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:35,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:35,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:35,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:35,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:35,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:35,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:35,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:35,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:35,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-13 23:31:35,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084601432] [2020-10-13 23:31:35,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:35,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:35,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264814522] [2020-10-13 23:31:35,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:35,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:35,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:35,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:35,884 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand 7 states. [2020-10-13 23:31:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:36,009 INFO L93 Difference]: Finished difference Result 234 states and 250 transitions. [2020-10-13 23:31:36,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:36,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-10-13 23:31:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:36,011 INFO L225 Difference]: With dead ends: 234 [2020-10-13 23:31:36,011 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 23:31:36,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 23:31:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 23:31:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:31:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2020-10-13 23:31:36,027 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 117 [2020-10-13 23:31:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:36,028 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2020-10-13 23:31:36,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2020-10-13 23:31:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:31:36,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:36,035 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 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 23:31:36,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:31:36,036 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1949266558, now seen corresponding path program 9 times [2020-10-13 23:31:36,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:36,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939467513] [2020-10-13 23:31:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:39,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:41,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:31:41,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:41,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 23:31:41,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:41,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:31:41,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:41,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:41,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:41,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:41,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:41,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:41,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-10-13 23:31:41,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939467513] [2020-10-13 23:31:41,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:41,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:41,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571870981] [2020-10-13 23:31:41,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:41,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:41,179 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand 10 states. [2020-10-13 23:31:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:41,509 INFO L93 Difference]: Finished difference Result 240 states and 261 transitions. [2020-10-13 23:31:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:41,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 119 [2020-10-13 23:31:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:41,510 INFO L225 Difference]: With dead ends: 240 [2020-10-13 23:31:41,511 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:31:41,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:31:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2020-10-13 23:31:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:31:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2020-10-13 23:31:41,517 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 119 [2020-10-13 23:31:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:41,517 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2020-10-13 23:31:41,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2020-10-13 23:31:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:31:41,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:41,519 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 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 23:31:41,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:31:41,520 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash 863682260, now seen corresponding path program 10 times [2020-10-13 23:31:41,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:41,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664560353] [2020-10-13 23:31:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:46,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:31:46,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:46,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 23:31:46,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:46,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:46,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:46,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:46,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:46,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:46,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:46,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:46,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:46,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:46,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:46,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:46,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:46,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:46,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:46,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:46,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-10-13 23:31:46,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664560353] [2020-10-13 23:31:46,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:46,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:46,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797621925] [2020-10-13 23:31:46,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:46,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:46,636 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 8 states. [2020-10-13 23:31:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:46,741 INFO L93 Difference]: Finished difference Result 264 states and 280 transitions. [2020-10-13 23:31:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:46,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-10-13 23:31:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:46,743 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:31:46,743 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 23:31:46,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 23:31:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 23:31:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 23:31:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2020-10-13 23:31:46,750 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 133 [2020-10-13 23:31:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:46,750 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2020-10-13 23:31:46,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2020-10-13 23:31:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:31:46,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:46,752 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 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 23:31:46,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:31:46,752 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1047433870, now seen corresponding path program 11 times [2020-10-13 23:31:46,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:46,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507164025] [2020-10-13 23:31:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:46,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:51,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 23:31:51,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:51,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:31:51,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:51,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:51,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:31:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:51,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:51,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:51,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:51,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:51,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:51,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:51,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:51,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:51,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:51,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:51,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:51,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-13 23:31:51,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507164025] [2020-10-13 23:31:51,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:51,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:51,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651136147] [2020-10-13 23:31:51,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:51,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:51,899 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand 11 states. [2020-10-13 23:31:52,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:52,302 INFO L93 Difference]: Finished difference Result 268 states and 289 transitions. [2020-10-13 23:31:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:52,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-10-13 23:31:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:52,304 INFO L225 Difference]: With dead ends: 268 [2020-10-13 23:31:52,305 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 23:31:52,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 23:31:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2020-10-13 23:31:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:31:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2020-10-13 23:31:52,312 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 135 [2020-10-13 23:31:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:52,313 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2020-10-13 23:31:52,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2020-10-13 23:31:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 23:31:52,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:52,314 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 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 23:31:52,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:31:52,314 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1700887236, now seen corresponding path program 12 times [2020-10-13 23:31:52,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:52,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104604985] [2020-10-13 23:31:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:52,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:57,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:57,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:57,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:57,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:57,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:57,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:57,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:57,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-13 23:31:57,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104604985] [2020-10-13 23:31:57,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:57,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:57,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089563062] [2020-10-13 23:31:57,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:57,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:57,403 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand 9 states. [2020-10-13 23:31:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:57,531 INFO L93 Difference]: Finished difference Result 294 states and 310 transitions. [2020-10-13 23:31:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:57,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 149 [2020-10-13 23:31:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:57,534 INFO L225 Difference]: With dead ends: 294 [2020-10-13 23:31:57,534 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:31:57,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:31:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 23:31:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:31:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 164 transitions. [2020-10-13 23:31:57,541 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 164 transitions. Word has length 149 [2020-10-13 23:31:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:57,541 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 164 transitions. [2020-10-13 23:31:57,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 164 transitions. [2020-10-13 23:31:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:31:57,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:57,543 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 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 23:31:57,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:31:57,544 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:57,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1160981858, now seen corresponding path program 13 times [2020-10-13 23:31:57,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:57,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477825082] [2020-10-13 23:31:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:57,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:02,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 23:32:02,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:02,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:32:02,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:02,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:02,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:32:02,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:02,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:02,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:02,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:02,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:02,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:02,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:02,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:02,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:02,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:02,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:02,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:02,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 23:32:02,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477825082] [2020-10-13 23:32:02,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:02,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:02,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377336304] [2020-10-13 23:32:02,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:02,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:02,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:02,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:02,716 INFO L87 Difference]: Start difference. First operand 156 states and 164 transitions. Second operand 12 states. [2020-10-13 23:32:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:03,095 INFO L93 Difference]: Finished difference Result 296 states and 317 transitions. [2020-10-13 23:32:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:03,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-10-13 23:32:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:03,097 INFO L225 Difference]: With dead ends: 296 [2020-10-13 23:32:03,097 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 23:32:03,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 23:32:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2020-10-13 23:32:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 23:32:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-10-13 23:32:03,104 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 151 [2020-10-13 23:32:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:03,105 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-10-13 23:32:03,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-10-13 23:32:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 23:32:03,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:03,107 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 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 23:32:03,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:32:03,107 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1831933620, now seen corresponding path program 14 times [2020-10-13 23:32:03,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:03,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579255475] [2020-10-13 23:32:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:03,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:08,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:32:08,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 23:32:08,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:08,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:32:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:08,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:08,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:08,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:08,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:08,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:08,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:08,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:08,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:08,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2020-10-13 23:32:08,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579255475] [2020-10-13 23:32:08,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:08,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:08,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132673678] [2020-10-13 23:32:08,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:08,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:08,280 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 13 states. [2020-10-13 23:32:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:08,683 INFO L93 Difference]: Finished difference Result 322 states and 343 transitions. [2020-10-13 23:32:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:08,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2020-10-13 23:32:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:08,685 INFO L225 Difference]: With dead ends: 322 [2020-10-13 23:32:08,685 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 23:32:08,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 23:32:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2020-10-13 23:32:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 23:32:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2020-10-13 23:32:08,697 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 165 [2020-10-13 23:32:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:08,699 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2020-10-13 23:32:08,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2020-10-13 23:32:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 23:32:08,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:08,702 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 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 23:32:08,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:32:08,703 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:08,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1183856506, now seen corresponding path program 15 times [2020-10-13 23:32:08,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:08,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722257568] [2020-10-13 23:32:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:08,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 23:32:13,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:13,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 23:32:13,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:13,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:13,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:13,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:13,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:13,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:13,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:13,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:13,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:13,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:13,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-13 23:32:13,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722257568] [2020-10-13 23:32:13,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:13,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:13,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960233311] [2020-10-13 23:32:13,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:13,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:13,830 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand 10 states. [2020-10-13 23:32:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:13,938 INFO L93 Difference]: Finished difference Result 352 states and 368 transitions. [2020-10-13 23:32:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:13,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 179 [2020-10-13 23:32:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:13,940 INFO L225 Difference]: With dead ends: 352 [2020-10-13 23:32:13,941 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:32:13,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:32:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-10-13 23:32:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 23:32:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 194 transitions. [2020-10-13 23:32:13,950 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 194 transitions. Word has length 179 [2020-10-13 23:32:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:13,950 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 194 transitions. [2020-10-13 23:32:13,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 194 transitions. [2020-10-13 23:32:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 23:32:13,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:13,952 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 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 23:32:13,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:32:13,953 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1737911644, now seen corresponding path program 16 times [2020-10-13 23:32:13,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:13,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572464408] [2020-10-13 23:32:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:13,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:19,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5467 [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:19,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:19,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:19,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:19,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:19,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:19,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:19,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:19,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:19,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2020-10-13 23:32:19,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572464408] [2020-10-13 23:32:19,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:19,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:19,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062211631] [2020-10-13 23:32:19,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:19,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:19,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:19,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:19,581 INFO L87 Difference]: Start difference. First operand 186 states and 194 transitions. Second operand 14 states. [2020-10-13 23:32:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:20,014 INFO L93 Difference]: Finished difference Result 350 states and 371 transitions. [2020-10-13 23:32:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:20,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 181 [2020-10-13 23:32:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:20,017 INFO L225 Difference]: With dead ends: 350 [2020-10-13 23:32:20,017 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 23:32:20,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 23:32:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2020-10-13 23:32:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 23:32:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2020-10-13 23:32:20,027 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 181 [2020-10-13 23:32:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:20,027 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2020-10-13 23:32:20,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2020-10-13 23:32:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 23:32:20,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:20,029 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 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 23:32:20,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:32:20,029 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:20,029 INFO L82 PathProgramCache]: Analyzing trace with hash -293789578, now seen corresponding path program 17 times [2020-10-13 23:32:20,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:20,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230471721] [2020-10-13 23:32:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:20,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:25,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 23:32:25,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:25,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:32:25,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:25,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:32:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:25,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:32:25,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:25,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:25,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:25,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:25,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:25,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:25,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:25,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-13 23:32:25,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230471721] [2020-10-13 23:32:25,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:25,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:32:25,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423021350] [2020-10-13 23:32:25,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:32:25,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:25,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:32:25,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:25,163 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand 11 states. [2020-10-13 23:32:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:25,289 INFO L93 Difference]: Finished difference Result 382 states and 398 transitions. [2020-10-13 23:32:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:32:25,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 195 [2020-10-13 23:32:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:25,292 INFO L225 Difference]: With dead ends: 382 [2020-10-13 23:32:25,292 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:32:25,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:32:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-13 23:32:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:32:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 210 transitions. [2020-10-13 23:32:25,301 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 210 transitions. Word has length 195 [2020-10-13 23:32:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:25,302 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 210 transitions. [2020-10-13 23:32:25,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:32:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 210 transitions. [2020-10-13 23:32:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:32:25,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:25,304 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 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 23:32:25,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:32:25,304 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash 948629140, now seen corresponding path program 18 times [2020-10-13 23:32:25,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:25,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506632972] [2020-10-13 23:32:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:30,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:32:30,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:30,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-13 23:32:30,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:30,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 23:32:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:30,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:30,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:30,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:30,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:30,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:30,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:30,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:30,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:30,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:30,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2020-10-13 23:32:30,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506632972] [2020-10-13 23:32:30,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:30,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:30,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567421962] [2020-10-13 23:32:30,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:30,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:30,591 INFO L87 Difference]: Start difference. First operand 202 states and 210 transitions. Second operand 15 states. [2020-10-13 23:32:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:31,103 INFO L93 Difference]: Finished difference Result 378 states and 399 transitions. [2020-10-13 23:32:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:31,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2020-10-13 23:32:31,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:31,105 INFO L225 Difference]: With dead ends: 378 [2020-10-13 23:32:31,105 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 23:32:31,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 23:32:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2020-10-13 23:32:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 23:32:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-10-13 23:32:31,114 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 197 [2020-10-13 23:32:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:31,115 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-10-13 23:32:31,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-10-13 23:32:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 23:32:31,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:31,117 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 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 23:32:31,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:32:31,117 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -293906330, now seen corresponding path program 19 times [2020-10-13 23:32:31,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:31,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269446331] [2020-10-13 23:32:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5177 [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 23:32:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:32:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:36,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:36,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:36,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:36,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:36,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:36,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:36,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:36,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:36,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:36,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:36,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2020-10-13 23:32:36,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269446331] [2020-10-13 23:32:36,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:36,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:32:36,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659310442] [2020-10-13 23:32:36,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:32:36,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:36,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:32:36,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:36,503 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 16 states. [2020-10-13 23:32:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:37,054 INFO L93 Difference]: Finished difference Result 404 states and 425 transitions. [2020-10-13 23:32:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:32:37,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 211 [2020-10-13 23:32:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:37,058 INFO L225 Difference]: With dead ends: 404 [2020-10-13 23:32:37,058 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 23:32:37,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 23:32:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2020-10-13 23:32:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 23:32:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 238 transitions. [2020-10-13 23:32:37,073 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 238 transitions. Word has length 211 [2020-10-13 23:32:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:37,073 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 238 transitions. [2020-10-13 23:32:37,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:32:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 238 transitions. [2020-10-13 23:32:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 23:32:37,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:37,075 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 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 23:32:37,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:32:37,075 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1227991736, now seen corresponding path program 20 times [2020-10-13 23:32:37,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:37,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867699204] [2020-10-13 23:32:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:37,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:42,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 23:32:42,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:42,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-13 23:32:42,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:42,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:42,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:42,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:42,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:42,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:42,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:42,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:42,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:42,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:42,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:42,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2020-10-13 23:32:42,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867699204] [2020-10-13 23:32:42,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:42,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:42,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820981198] [2020-10-13 23:32:42,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:42,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:42,278 INFO L87 Difference]: Start difference. First operand 230 states and 238 transitions. Second operand 12 states. [2020-10-13 23:32:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:42,412 INFO L93 Difference]: Finished difference Result 440 states and 456 transitions. [2020-10-13 23:32:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:42,412 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 225 [2020-10-13 23:32:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:42,414 INFO L225 Difference]: With dead ends: 440 [2020-10-13 23:32:42,415 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 23:32:42,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 23:32:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-13 23:32:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:32:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-10-13 23:32:42,424 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 225 [2020-10-13 23:32:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:42,425 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-10-13 23:32:42,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-10-13 23:32:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:32:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:42,427 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 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 23:32:42,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:32:42,427 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash 48918614, now seen corresponding path program 21 times [2020-10-13 23:32:42,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:42,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756834200] [2020-10-13 23:32:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:42,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:47,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:32:47,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:47,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 23:32:47,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:47,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:32:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-13 23:32:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:32:47,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:47,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:47,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:47,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:47,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:47,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:47,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:47,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:47,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:47,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2020-10-13 23:32:47,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756834200] [2020-10-13 23:32:47,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:47,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:32:47,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870160028] [2020-10-13 23:32:47,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:32:47,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:47,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:32:47,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:47,713 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 17 states. [2020-10-13 23:32:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:48,261 INFO L93 Difference]: Finished difference Result 432 states and 453 transitions. [2020-10-13 23:32:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:32:48,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 227 [2020-10-13 23:32:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:48,264 INFO L225 Difference]: With dead ends: 432 [2020-10-13 23:32:48,264 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 23:32:48,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 23:32:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2020-10-13 23:32:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-13 23:32:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 254 transitions. [2020-10-13 23:32:48,273 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 254 transitions. Word has length 227 [2020-10-13 23:32:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:48,274 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 254 transitions. [2020-10-13 23:32:48,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:32:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 254 transitions. [2020-10-13 23:32:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-13 23:32:48,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:48,276 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 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 23:32:48,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:32:48,276 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1360748888, now seen corresponding path program 22 times [2020-10-13 23:32:48,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:48,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950506828] [2020-10-13 23:32:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:48,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:48,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:53,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-13 23:32:53,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-13 23:32:53,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:53,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:53,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:53,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:53,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:53,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:53,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:53,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:53,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:53,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:53,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2020-10-13 23:32:53,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950506828] [2020-10-13 23:32:53,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:53,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:53,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349599242] [2020-10-13 23:32:53,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:53,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:53,492 INFO L87 Difference]: Start difference. First operand 246 states and 254 transitions. Second operand 13 states. [2020-10-13 23:32:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:53,640 INFO L93 Difference]: Finished difference Result 470 states and 486 transitions. [2020-10-13 23:32:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:53,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 241 [2020-10-13 23:32:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:53,642 INFO L225 Difference]: With dead ends: 470 [2020-10-13 23:32:53,642 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 23:32:53,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 23:32:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2020-10-13 23:32:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-13 23:32:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2020-10-13 23:32:53,652 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 241 [2020-10-13 23:32:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:53,652 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2020-10-13 23:32:53,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2020-10-13 23:32:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 23:32:53,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:53,655 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 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 23:32:53,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:32:53,655 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:53,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2034919494, now seen corresponding path program 23 times [2020-10-13 23:32:53,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:53,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688840996] [2020-10-13 23:32:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:53,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:58,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-13 23:32:58,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:58,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-13 23:32:58,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:58,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:58,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:32:58,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:32:58,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:32:58,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:59,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:59,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:59,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:59,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:59,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:59,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:59,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-13 23:32:59,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688840996] [2020-10-13 23:32:59,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:59,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:32:59,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019830705] [2020-10-13 23:32:59,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:32:59,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:32:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:59,086 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand 18 states. [2020-10-13 23:32:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:59,653 INFO L93 Difference]: Finished difference Result 460 states and 481 transitions. [2020-10-13 23:32:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:32:59,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 243 [2020-10-13 23:32:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:59,656 INFO L225 Difference]: With dead ends: 460 [2020-10-13 23:32:59,656 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 23:32:59,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 23:32:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2020-10-13 23:32:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 23:32:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 270 transitions. [2020-10-13 23:32:59,667 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 270 transitions. Word has length 243 [2020-10-13 23:32:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:59,667 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 270 transitions. [2020-10-13 23:32:59,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:32:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 270 transitions. [2020-10-13 23:32:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-13 23:32:59,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:59,669 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 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 23:32:59,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:32:59,669 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash 445674136, now seen corresponding path program 24 times [2020-10-13 23:32:59,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:59,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227582116] [2020-10-13 23:32:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:59,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:04,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:04,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-13 23:33:04,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-13 23:33:04,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:04,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:33:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:33:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:04,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:04,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:04,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:04,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:04,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:04,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:04,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-13 23:33:04,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227582116] [2020-10-13 23:33:04,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:04,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:33:04,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280576749] [2020-10-13 23:33:04,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:33:04,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:33:04,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:04,991 INFO L87 Difference]: Start difference. First operand 262 states and 270 transitions. Second operand 14 states. [2020-10-13 23:33:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:05,130 INFO L93 Difference]: Finished difference Result 500 states and 516 transitions. [2020-10-13 23:33:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:33:05,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 257 [2020-10-13 23:33:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:05,135 INFO L225 Difference]: With dead ends: 500 [2020-10-13 23:33:05,135 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 23:33:05,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 23:33:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2020-10-13 23:33:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-13 23:33:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2020-10-13 23:33:05,145 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 257 [2020-10-13 23:33:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:05,145 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2020-10-13 23:33:05,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:33:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2020-10-13 23:33:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-13 23:33:05,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:05,147 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 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 23:33:05,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:33:05,147 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1558495178, now seen corresponding path program 25 times [2020-10-13 23:33:05,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:05,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574272815] [2020-10-13 23:33:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:05,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:10,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:33:10,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:10,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:10,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:10,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2020-10-13 23:33:10,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574272815] [2020-10-13 23:33:10,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:10,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:33:10,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207902504] [2020-10-13 23:33:10,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:33:10,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:10,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:33:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:10,437 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand 19 states. [2020-10-13 23:33:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:10,976 INFO L93 Difference]: Finished difference Result 488 states and 509 transitions. [2020-10-13 23:33:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:33:10,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 259 [2020-10-13 23:33:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:10,979 INFO L225 Difference]: With dead ends: 488 [2020-10-13 23:33:10,979 INFO L226 Difference]: Without dead ends: 285 [2020-10-13 23:33:10,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-13 23:33:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 278. [2020-10-13 23:33:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-13 23:33:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 286 transitions. [2020-10-13 23:33:10,988 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 286 transitions. Word has length 259 [2020-10-13 23:33:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:10,989 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 286 transitions. [2020-10-13 23:33:10,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:33:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 286 transitions. [2020-10-13 23:33:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-13 23:33:10,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:10,991 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 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 23:33:10,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:33:10,991 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:10,992 INFO L82 PathProgramCache]: Analyzing trace with hash -776657272, now seen corresponding path program 26 times [2020-10-13 23:33:10,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:10,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933137252] [2020-10-13 23:33:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:11,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:16,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:16,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-13 23:33:16,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5281 [2020-10-13 23:33:16,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:16,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:16,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:33:16,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 23:33:16,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:33:16,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:16,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:16,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:16,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:16,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:16,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:16,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:16,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:16,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:16,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:16,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1913 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2020-10-13 23:33:16,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933137252] [2020-10-13 23:33:16,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:16,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:33:16,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750439262] [2020-10-13 23:33:16,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:33:16,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:33:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:16,621 INFO L87 Difference]: Start difference. First operand 278 states and 286 transitions. Second operand 20 states. [2020-10-13 23:33:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:17,320 INFO L93 Difference]: Finished difference Result 514 states and 535 transitions. [2020-10-13 23:33:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:33:17,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 273 [2020-10-13 23:33:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:17,323 INFO L225 Difference]: With dead ends: 514 [2020-10-13 23:33:17,323 INFO L226 Difference]: Without dead ends: 299 [2020-10-13 23:33:17,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-13 23:33:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2020-10-13 23:33:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-13 23:33:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 300 transitions. [2020-10-13 23:33:17,334 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 300 transitions. Word has length 273 [2020-10-13 23:33:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:17,334 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 300 transitions. [2020-10-13 23:33:17,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:33:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 300 transitions. [2020-10-13 23:33:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-13 23:33:17,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:17,336 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 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 23:33:17,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:33:17,337 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:17,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1388385626, now seen corresponding path program 27 times [2020-10-13 23:33:17,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:17,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845229131] [2020-10-13 23:33:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:17,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:22,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:22,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-13 23:33:22,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 23:33:22,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:22,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:22,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:33:22,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:22,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:33:22,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:22,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:22,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:22,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:22,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:22,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:22,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:22,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:22,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:22,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2144 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2020-10-13 23:33:22,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845229131] [2020-10-13 23:33:22,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:22,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:33:22,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234065451] [2020-10-13 23:33:22,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:33:22,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:33:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:22,639 INFO L87 Difference]: Start difference. First operand 292 states and 300 transitions. Second operand 15 states. [2020-10-13 23:33:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:22,839 INFO L93 Difference]: Finished difference Result 558 states and 574 transitions. [2020-10-13 23:33:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:33:22,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 287 [2020-10-13 23:33:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:22,841 INFO L225 Difference]: With dead ends: 558 [2020-10-13 23:33:22,841 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 23:33:22,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 23:33:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2020-10-13 23:33:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-13 23:33:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 302 transitions. [2020-10-13 23:33:22,852 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 302 transitions. Word has length 287 [2020-10-13 23:33:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:22,852 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 302 transitions. [2020-10-13 23:33:22,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:33:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 302 transitions. [2020-10-13 23:33:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-13 23:33:22,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:22,855 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 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 23:33:22,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:33:22,855 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash 500349560, now seen corresponding path program 28 times [2020-10-13 23:33:22,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:22,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745969061] [2020-10-13 23:33:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:22,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:22,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:27,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:27,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-13 23:33:27,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:27,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-13 23:33:27,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:27,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:27,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:33:27,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:33:27,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:33:27,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:28,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:28,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:28,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:28,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:28,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2020-10-13 23:33:28,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745969061] [2020-10-13 23:33:28,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:28,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:33:28,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539576646] [2020-10-13 23:33:28,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:33:28,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:28,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:33:28,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:28,263 INFO L87 Difference]: Start difference. First operand 294 states and 302 transitions. Second operand 21 states. [2020-10-13 23:33:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:28,901 INFO L93 Difference]: Finished difference Result 542 states and 563 transitions. [2020-10-13 23:33:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:33:28,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 289 [2020-10-13 23:33:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:28,903 INFO L225 Difference]: With dead ends: 542 [2020-10-13 23:33:28,904 INFO L226 Difference]: Without dead ends: 315 [2020-10-13 23:33:28,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-13 23:33:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 308. [2020-10-13 23:33:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-13 23:33:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 316 transitions. [2020-10-13 23:33:28,917 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 316 transitions. Word has length 289 [2020-10-13 23:33:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:28,917 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 316 transitions. [2020-10-13 23:33:28,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:33:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 316 transitions. [2020-10-13 23:33:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-13 23:33:28,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:28,920 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 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 23:33:28,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:33:28,921 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -749107894, now seen corresponding path program 29 times [2020-10-13 23:33:28,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:28,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766746990] [2020-10-13 23:33:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:28,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:28,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:34,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-13 23:33:34,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:34,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5356 [2020-10-13 23:33:34,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:34,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:34,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:34,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:34,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:34,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:34,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:34,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:34,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:34,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:34,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:34,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:34,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2412 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-13 23:33:34,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766746990] [2020-10-13 23:33:34,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:34,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:34,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108130858] [2020-10-13 23:33:34,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:34,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:34,527 INFO L87 Difference]: Start difference. First operand 308 states and 316 transitions. Second operand 16 states. [2020-10-13 23:33:34,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:34,680 INFO L93 Difference]: Finished difference Result 588 states and 604 transitions. [2020-10-13 23:33:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:34,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 303 [2020-10-13 23:33:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:34,682 INFO L225 Difference]: With dead ends: 588 [2020-10-13 23:33:34,682 INFO L226 Difference]: Without dead ends: 311 [2020-10-13 23:33:34,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-13 23:33:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-10-13 23:33:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 23:33:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 318 transitions. [2020-10-13 23:33:34,693 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 318 transitions. Word has length 303 [2020-10-13 23:33:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:34,694 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 318 transitions. [2020-10-13 23:33:34,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 318 transitions. [2020-10-13 23:33:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-13 23:33:34,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:34,696 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 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 23:33:34,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:33:34,696 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1281961576, now seen corresponding path program 30 times [2020-10-13 23:33:34,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:34,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105295550] [2020-10-13 23:33:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:40,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:40,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-13 23:33:40,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:40,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5279 [2020-10-13 23:33:40,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:40,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:33:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-13 23:33:40,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:33:40,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:40,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:40,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:40,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:40,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:40,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:40,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:40,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:40,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:40,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:40,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2437 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2020-10-13 23:33:40,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105295550] [2020-10-13 23:33:40,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:40,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:33:40,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508419889] [2020-10-13 23:33:40,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:33:40,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:33:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:40,346 INFO L87 Difference]: Start difference. First operand 310 states and 318 transitions. Second operand 22 states. [2020-10-13 23:33:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:41,038 INFO L93 Difference]: Finished difference Result 570 states and 591 transitions. [2020-10-13 23:33:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:33:41,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 305 [2020-10-13 23:33:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:41,042 INFO L225 Difference]: With dead ends: 570 [2020-10-13 23:33:41,042 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 23:33:41,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 23:33:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2020-10-13 23:33:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-13 23:33:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 332 transitions. [2020-10-13 23:33:41,061 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 332 transitions. Word has length 305 [2020-10-13 23:33:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:41,062 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 332 transitions. [2020-10-13 23:33:41,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:33:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 332 transitions. [2020-10-13 23:33:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-13 23:33:41,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:41,066 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 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 23:33:41,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:33:41,066 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:41,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1670195910, now seen corresponding path program 31 times [2020-10-13 23:33:41,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:41,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489722247] [2020-10-13 23:33:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:41,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:46,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:46,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-13 23:33:46,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:46,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-13 23:33:46,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:46,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:46,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:33:46,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-13 23:33:46,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:33:46,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:46,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:46,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:46,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:46,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:46,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:46,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:46,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:46,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:46,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2696 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2020-10-13 23:33:46,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489722247] [2020-10-13 23:33:46,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:46,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:33:46,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206973588] [2020-10-13 23:33:46,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:33:46,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:33:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:46,564 INFO L87 Difference]: Start difference. First operand 324 states and 332 transitions. Second operand 23 states. [2020-10-13 23:33:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:47,328 INFO L93 Difference]: Finished difference Result 596 states and 617 transitions. [2020-10-13 23:33:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:33:47,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 319 [2020-10-13 23:33:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:47,331 INFO L225 Difference]: With dead ends: 596 [2020-10-13 23:33:47,331 INFO L226 Difference]: Without dead ends: 345 [2020-10-13 23:33:47,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-13 23:33:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 338. [2020-10-13 23:33:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-13 23:33:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 346 transitions. [2020-10-13 23:33:47,342 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 346 transitions. Word has length 319 [2020-10-13 23:33:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:47,342 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 346 transitions. [2020-10-13 23:33:47,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:33:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 346 transitions. [2020-10-13 23:33:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-13 23:33:47,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:47,345 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 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 23:33:47,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:33:47,345 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1598268556, now seen corresponding path program 32 times [2020-10-13 23:33:47,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:47,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007892593] [2020-10-13 23:33:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:47,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:52,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5383 [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:33:52,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:52,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:52,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:52,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:52,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:52,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:52,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:52,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:52,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2969 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2800 trivial. 0 not checked. [2020-10-13 23:33:52,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007892593] [2020-10-13 23:33:52,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:52,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:33:52,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189917936] [2020-10-13 23:33:52,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:33:52,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:33:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:52,964 INFO L87 Difference]: Start difference. First operand 338 states and 346 transitions. Second operand 17 states. [2020-10-13 23:33:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:53,141 INFO L93 Difference]: Finished difference Result 646 states and 662 transitions. [2020-10-13 23:33:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:33:53,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 333 [2020-10-13 23:33:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:53,144 INFO L225 Difference]: With dead ends: 646 [2020-10-13 23:33:53,144 INFO L226 Difference]: Without dead ends: 341 [2020-10-13 23:33:53,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-13 23:33:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2020-10-13 23:33:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 23:33:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 348 transitions. [2020-10-13 23:33:53,153 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 348 transitions. Word has length 333 [2020-10-13 23:33:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:53,153 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 348 transitions. [2020-10-13 23:33:53,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:33:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 348 transitions. [2020-10-13 23:33:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-13 23:33:53,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:53,156 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 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 23:33:53,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:33:53,156 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash -208861910, now seen corresponding path program 33 times [2020-10-13 23:33:53,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:53,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142121177] [2020-10-13 23:33:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:53,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:58,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:58,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-13 23:33:58,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:58,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5648 [2020-10-13 23:33:58,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:58,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:33:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 23:33:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:33:58,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:59,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:59,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:59,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:59,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2596 trivial. 0 not checked. [2020-10-13 23:33:59,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142121177] [2020-10-13 23:33:59,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:59,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:33:59,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033938099] [2020-10-13 23:33:59,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:33:59,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:33:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:59,217 INFO L87 Difference]: Start difference. First operand 340 states and 348 transitions. Second operand 24 states. [2020-10-13 23:34:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:00,007 INFO L93 Difference]: Finished difference Result 624 states and 645 transitions. [2020-10-13 23:34:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:34:00,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 335 [2020-10-13 23:34:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:00,011 INFO L225 Difference]: With dead ends: 624 [2020-10-13 23:34:00,011 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 23:34:00,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 23:34:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 354. [2020-10-13 23:34:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-13 23:34:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 362 transitions. [2020-10-13 23:34:00,020 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 362 transitions. Word has length 335 [2020-10-13 23:34:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:00,020 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 362 transitions. [2020-10-13 23:34:00,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:34:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 362 transitions. [2020-10-13 23:34:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-13 23:34:00,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:00,023 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 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 23:34:00,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:34:00,023 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1010323332, now seen corresponding path program 34 times [2020-10-13 23:34:00,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:00,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403258610] [2020-10-13 23:34:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:05,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:05,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-13 23:34:05,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:05,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5654 [2020-10-13 23:34:05,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:05,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:05,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:34:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:34:05,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:05,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:05,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:05,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:05,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:05,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:05,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:05,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:05,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:05,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3283 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2020-10-13 23:34:05,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403258610] [2020-10-13 23:34:05,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:05,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:34:05,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637954983] [2020-10-13 23:34:05,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:34:05,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:34:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:05,955 INFO L87 Difference]: Start difference. First operand 354 states and 362 transitions. Second operand 18 states. [2020-10-13 23:34:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:06,132 INFO L93 Difference]: Finished difference Result 676 states and 692 transitions. [2020-10-13 23:34:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:34:06,133 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 349 [2020-10-13 23:34:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:06,136 INFO L225 Difference]: With dead ends: 676 [2020-10-13 23:34:06,136 INFO L226 Difference]: Without dead ends: 357 [2020-10-13 23:34:06,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-13 23:34:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2020-10-13 23:34:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 23:34:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 364 transitions. [2020-10-13 23:34:06,145 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 364 transitions. Word has length 349 [2020-10-13 23:34:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:06,145 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 364 transitions. [2020-10-13 23:34:06,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:34:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 364 transitions. [2020-10-13 23:34:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-13 23:34:06,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:06,148 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 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 23:34:06,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:34:06,148 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash 573052186, now seen corresponding path program 35 times [2020-10-13 23:34:06,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:06,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106815622] [2020-10-13 23:34:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:06,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:11,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:11,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-13 23:34:11,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5567 [2020-10-13 23:34:11,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:11,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:11,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:34:11,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:34:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:34:11,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:12,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:12,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:12,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:34:12,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:12,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:12,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:12,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3312 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2871 trivial. 0 not checked. [2020-10-13 23:34:12,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106815622] [2020-10-13 23:34:12,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:12,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:34:12,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228414720] [2020-10-13 23:34:12,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:34:12,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:34:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:12,137 INFO L87 Difference]: Start difference. First operand 356 states and 364 transitions. Second operand 25 states. [2020-10-13 23:34:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:12,968 INFO L93 Difference]: Finished difference Result 652 states and 673 transitions. [2020-10-13 23:34:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:34:12,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 351 [2020-10-13 23:34:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:12,971 INFO L225 Difference]: With dead ends: 652 [2020-10-13 23:34:12,971 INFO L226 Difference]: Without dead ends: 377 [2020-10-13 23:34:12,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-13 23:34:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2020-10-13 23:34:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-13 23:34:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 378 transitions. [2020-10-13 23:34:12,981 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 378 transitions. Word has length 351 [2020-10-13 23:34:12,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:12,981 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 378 transitions. [2020-10-13 23:34:12,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:34:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 378 transitions. [2020-10-13 23:34:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-13 23:34:12,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:12,984 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 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 23:34:12,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:34:12,984 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1277911956, now seen corresponding path program 36 times [2020-10-13 23:34:12,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:12,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708190830] [2020-10-13 23:34:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:13,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:18,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-13 23:34:18,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5373 [2020-10-13 23:34:18,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:18,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:34:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:34:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:18,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:18,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:18,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:18,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:18,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:18,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:18,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:18,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:18,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:18,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:18,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2020-10-13 23:34:18,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708190830] [2020-10-13 23:34:18,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:18,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:34:18,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040566478] [2020-10-13 23:34:18,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:34:18,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:18,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:34:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:18,704 INFO L87 Difference]: Start difference. First operand 370 states and 378 transitions. Second operand 19 states. [2020-10-13 23:34:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:18,875 INFO L93 Difference]: Finished difference Result 706 states and 722 transitions. [2020-10-13 23:34:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:34:18,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 365 [2020-10-13 23:34:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:18,878 INFO L225 Difference]: With dead ends: 706 [2020-10-13 23:34:18,878 INFO L226 Difference]: Without dead ends: 373 [2020-10-13 23:34:18,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-13 23:34:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 372. [2020-10-13 23:34:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-13 23:34:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 380 transitions. [2020-10-13 23:34:18,886 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 380 transitions. Word has length 365 [2020-10-13 23:34:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:18,886 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 380 transitions. [2020-10-13 23:34:18,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:34:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 380 transitions. [2020-10-13 23:34:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-13 23:34:18,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:18,890 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 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 23:34:18,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:34:18,890 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:18,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1975780618, now seen corresponding path program 37 times [2020-10-13 23:34:18,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:18,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631882282] [2020-10-13 23:34:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:18,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:24,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5436 [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:34:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:24,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:24,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:24,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:24,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3644 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2020-10-13 23:34:24,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631882282] [2020-10-13 23:34:24,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:24,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:34:24,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699957391] [2020-10-13 23:34:24,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:34:24,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:34:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:24,774 INFO L87 Difference]: Start difference. First operand 372 states and 380 transitions. Second operand 26 states. [2020-10-13 23:34:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:25,634 INFO L93 Difference]: Finished difference Result 680 states and 701 transitions. [2020-10-13 23:34:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:34:25,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 367 [2020-10-13 23:34:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:25,637 INFO L225 Difference]: With dead ends: 680 [2020-10-13 23:34:25,637 INFO L226 Difference]: Without dead ends: 393 [2020-10-13 23:34:25,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-13 23:34:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 386. [2020-10-13 23:34:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-13 23:34:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 394 transitions. [2020-10-13 23:34:25,647 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 394 transitions. Word has length 367 [2020-10-13 23:34:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:25,648 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 394 transitions. [2020-10-13 23:34:25,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:34:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 394 transitions. [2020-10-13 23:34:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-13 23:34:25,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:25,651 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 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 23:34:25,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:34:25,651 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:25,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:25,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1894410332, now seen corresponding path program 38 times [2020-10-13 23:34:25,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:25,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128134575] [2020-10-13 23:34:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:25,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:25,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:25,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:25,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:25,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking...