/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/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:20:07,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:20:07,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:20:07,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:20:07,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:20:07,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:20:07,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:20:07,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:20:07,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:20:07,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:20:07,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:20:07,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:20:07,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:20:07,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:20:07,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:20:07,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:20:07,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:20:07,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:20:07,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:20:07,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:20:07,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:20:07,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:20:07,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:20:07,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:20:07,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:20:07,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:20:07,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:20:07,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:20:07,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:20:07,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:20:07,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:20:07,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:20:07,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:20:07,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:20:07,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:20:07,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:20:07,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:20:07,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:20:07,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:20:07,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:20:07,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:20:07,182 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 [2020-10-14 05:20:07,202 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:20:07,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:20:07,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:20:07,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:20:07,204 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:20:07,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:20:07,205 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:20:07,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:20:07,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:20:07,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:20:07,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:20:07,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:20:07,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:20:07,206 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:20:07,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:20:07,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:20:07,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:20:07,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:20:07,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:20:07,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:20:07,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:20:07,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:20:07,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:20:07,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:20:07,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:20:07,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:20:07,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:20:07,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:20:07,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:20:07,209 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; [2020-10-14 05:20:07,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:20:07,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:20:07,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:20:07,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:20:07,569 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:20:07,569 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-14 05:20:07,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0c360b7f/2446a04efa1b4403a8ae25f4228c55c5/FLAG6f423f152 [2020-10-14 05:20:08,087 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:20:08,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-14 05:20:08,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0c360b7f/2446a04efa1b4403a8ae25f4228c55c5/FLAG6f423f152 [2020-10-14 05:20:08,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0c360b7f/2446a04efa1b4403a8ae25f4228c55c5 [2020-10-14 05:20:08,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:20:08,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:20:08,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:20:08,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:20:08,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:20:08,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4231a4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08, skipping insertion in model container [2020-10-14 05:20:08,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:20:08,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:20:08,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:20:08,776 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:20:08,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:20:08,816 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:20:08,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08 WrapperNode [2020-10-14 05:20:08,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:20:08,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:20:08,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:20:08,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:20:08,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (1/1) ... [2020-10-14 05:20:08,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:20:08,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:20:08,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:20:08,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:20:08,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (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 [2020-10-14 05:20:09,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:20:09,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:20:09,035 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:20:09,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:20:09,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:20:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:20:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:20:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:20:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:20:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:20:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:20:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:20:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:20:09,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:20:09,234 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:20:09,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:20:09 BoogieIcfgContainer [2020-10-14 05:20:09,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:20:09,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:20:09,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:20:09,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:20:09,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:20:08" (1/3) ... [2020-10-14 05:20:09,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720548a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:20:09, skipping insertion in model container [2020-10-14 05:20:09,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:08" (2/3) ... [2020-10-14 05:20:09,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720548a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:20:09, skipping insertion in model container [2020-10-14 05:20:09,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:20:09" (3/3) ... [2020-10-14 05:20:09,246 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-10-14 05:20:09,256 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:20:09,264 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:20:09,279 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:20:09,307 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:20:09,308 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:20:09,308 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:20:09,308 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:20:09,308 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:20:09,308 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:20:09,308 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:20:09,308 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:20:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-14 05:20:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:20:09,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:09,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:09,333 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1915647303, now seen corresponding path program 1 times [2020-10-14 05:20:09,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:09,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230971357] [2020-10-14 05:20:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:09,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:20:09,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:09,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-14 05:20:09,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:09,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:09,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:09,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:20:09,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:09,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:09,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:09,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:20:09,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:09,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:09,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:09,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230971357] [2020-10-14 05:20:09,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:20:09,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:20:09,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239201307] [2020-10-14 05:20:09,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:20:09,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:20:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:20:09,675 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-14 05:20:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:09,706 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-14 05:20:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:20:09,708 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:20:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:09,719 INFO L225 Difference]: With dead ends: 32 [2020-10-14 05:20:09,719 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 05:20:09,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:20:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 05:20:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 05:20:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 05:20:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-14 05:20:09,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-14 05:20:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:09,770 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-14 05:20:09,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:20:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-14 05:20:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:20:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:09,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:09,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:20:09,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2084433522, now seen corresponding path program 1 times [2020-10-14 05:20:09,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:09,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247041567] [2020-10-14 05:20:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:09,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:09,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-14 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:09,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:20:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:09,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:20:09,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:10,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:20:10,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:10,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:10,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:10,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 05:20:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:10,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247041567] [2020-10-14 05:20:10,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:20:10,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:20:10,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028697880] [2020-10-14 05:20:10,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:20:10,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:10,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:20:10,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:20:10,083 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-10-14 05:20:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:10,173 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-14 05:20:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:20:10,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-14 05:20:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:10,175 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:20:10,175 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:20:10,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:20:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:20:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:20:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-14 05:20:10,182 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-14 05:20:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:10,183 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-14 05:20:10,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:20:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-14 05:20:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:20:10,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:10,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:10,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:20:10,185 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 249504553, now seen corresponding path program 1 times [2020-10-14 05:20:10,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:10,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981403671] [2020-10-14 05:20:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:20:10,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 05:20:10,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:20:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:20:10,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:10,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:10,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:10,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:10,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:10,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981403671] [2020-10-14 05:20:10,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:10,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:20:10,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567181181] [2020-10-14 05:20:10,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:20:10,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:20:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:10,359 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-10-14 05:20:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:10,415 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-14 05:20:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:20:10,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-14 05:20:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:10,417 INFO L225 Difference]: With dead ends: 24 [2020-10-14 05:20:10,417 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:20:10,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:20:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:20:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:20:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-14 05:20:10,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2020-10-14 05:20:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:10,425 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-14 05:20:10,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:20:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-14 05:20:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:20:10,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:10,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:10,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:20:10,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2070634734, now seen corresponding path program 2 times [2020-10-14 05:20:10,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:10,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57417989] [2020-10-14 05:20:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:20:10,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-14 05:20:10,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:20:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:20:10,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:10,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:10,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:10,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:10,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57417989] [2020-10-14 05:20:10,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:10,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:20:10,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635543971] [2020-10-14 05:20:10,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:20:10,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:20:10,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:20:10,658 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-10-14 05:20:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:10,733 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-14 05:20:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:20:10,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:20:10,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:10,734 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:20:10,735 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:20:10,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:20:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:20:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:20:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-14 05:20:10,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 18 [2020-10-14 05:20:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:10,741 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-14 05:20:10,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:20:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-14 05:20:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:20:10,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:10,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:10,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:20:10,743 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:10,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:10,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1863528073, now seen corresponding path program 3 times [2020-10-14 05:20:10,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:10,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454469948] [2020-10-14 05:20:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:20:10,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-14 05:20:10,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:20:10,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:10,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:20:10,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:10,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:10,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:10,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:10,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:10,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454469948] [2020-10-14 05:20:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:10,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:20:10,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146450931] [2020-10-14 05:20:10,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:20:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:20:10,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:10,984 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-10-14 05:20:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:11,058 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-14 05:20:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:20:11,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-14 05:20:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:11,060 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:20:11,060 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:20:11,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:20:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 05:20:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:20:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-10-14 05:20:11,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 21 [2020-10-14 05:20:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:11,068 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-10-14 05:20:11,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:20:11,068 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-10-14 05:20:11,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:20:11,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:11,070 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:11,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:20:11,070 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:11,071 INFO L82 PathProgramCache]: Analyzing trace with hash -854829134, now seen corresponding path program 4 times [2020-10-14 05:20:11,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:11,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048762363] [2020-10-14 05:20:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:11,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:20:11,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:11,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-14 05:20:11,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:11,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:20:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:20:11,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:11,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:11,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:11,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:11,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:11,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:11,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:11,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:11,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:20:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:11,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048762363] [2020-10-14 05:20:11,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:11,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:20:11,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107019773] [2020-10-14 05:20:11,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:20:11,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:11,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:20:11,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:20:11,346 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-10-14 05:20:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:11,445 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-14 05:20:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:20:11,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 05:20:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:11,447 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:20:11,447 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:20:11,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:20:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:20:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:20:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-14 05:20:11,455 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2020-10-14 05:20:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:11,456 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-14 05:20:11,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:20:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-14 05:20:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:20:11,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:11,457 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:11,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:20:11,458 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1826016791, now seen corresponding path program 5 times [2020-10-14 05:20:11,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:11,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469359743] [2020-10-14 05:20:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:11,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:20:11,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:11,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 05:20:11,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:11,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:11,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:20:11,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:11,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:20:11,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:11,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:11,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:11,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:11,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:11,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:11,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:11,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:11,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:11,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469359743] [2020-10-14 05:20:11,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:11,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:20:11,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875059448] [2020-10-14 05:20:11,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:20:11,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:11,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:20:11,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:11,780 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2020-10-14 05:20:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:11,905 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-14 05:20:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:20:11,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 05:20:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:11,907 INFO L225 Difference]: With dead ends: 36 [2020-10-14 05:20:11,907 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:20:11,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:20:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 05:20:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:20:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-14 05:20:11,919 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 27 [2020-10-14 05:20:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:11,920 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-14 05:20:11,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:20:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-14 05:20:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:20:11,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:11,921 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:11,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:20:11,921 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash 717166674, now seen corresponding path program 6 times [2020-10-14 05:20:11,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:11,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630403059] [2020-10-14 05:20:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:12,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:12,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:20:12,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:12,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-14 05:20:12,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:12,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:20:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:20:12,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:12,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:12,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:12,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:12,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:12,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:12,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:12,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:12,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:12,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:12,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:12,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630403059] [2020-10-14 05:20:12,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:12,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:20:12,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674209334] [2020-10-14 05:20:12,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:20:12,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:20:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:12,259 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 11 states. [2020-10-14 05:20:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:12,378 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-14 05:20:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:20:12,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 05:20:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:12,380 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:20:12,380 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:20:12,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:20:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-14 05:20:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:20:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-14 05:20:12,387 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2020-10-14 05:20:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:12,388 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-14 05:20:12,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:20:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-14 05:20:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:20:12,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:12,389 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:12,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:20:12,390 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1472671049, now seen corresponding path program 7 times [2020-10-14 05:20:12,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:12,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273095456] [2020-10-14 05:20:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:12,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:12,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:12,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:20:12,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-14 05:20:12,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:12,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:12,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:20:12,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:12,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:20:12,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:12,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:12,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:12,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:12,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:12,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:12,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:12,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:12,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:12,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:12,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:12,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:12,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:12,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273095456] [2020-10-14 05:20:12,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:12,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:20:12,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408480599] [2020-10-14 05:20:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:20:12,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:20:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:12,704 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 12 states. [2020-10-14 05:20:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:12,918 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-14 05:20:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:20:12,919 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-14 05:20:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:12,920 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:20:12,920 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:20:12,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:20:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:20:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:20:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:20:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-10-14 05:20:12,927 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 33 [2020-10-14 05:20:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:12,927 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-10-14 05:20:12,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:20:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-10-14 05:20:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:20:12,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:12,929 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:12,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:20:12,929 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1220091662, now seen corresponding path program 8 times [2020-10-14 05:20:12,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:12,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943480179] [2020-10-14 05:20:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:12,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:13,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:13,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:20:13,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:13,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-14 05:20:13,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:13,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:20:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:20:13,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:13,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:13,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:13,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:13,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:13,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:13,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:13,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:13,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:13,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943480179] [2020-10-14 05:20:13,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:13,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:20:13,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886627697] [2020-10-14 05:20:13,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:20:13,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:20:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:20:13,298 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 13 states. [2020-10-14 05:20:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:13,487 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-14 05:20:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:20:13,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-14 05:20:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:13,488 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:20:13,488 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:20:13,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:20:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:20:13,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-14 05:20:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 05:20:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-10-14 05:20:13,495 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 36 [2020-10-14 05:20:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:13,496 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-10-14 05:20:13,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:20:13,496 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-10-14 05:20:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:20:13,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:13,497 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:13,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:20:13,498 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:13,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:13,498 INFO L82 PathProgramCache]: Analyzing trace with hash 85139625, now seen corresponding path program 9 times [2020-10-14 05:20:13,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:13,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266147168] [2020-10-14 05:20:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:13,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:13,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:13,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:20:13,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-14 05:20:13,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:13,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:20:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:13,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:20:13,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:13,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:13,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:13,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:13,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:13,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:13,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:13,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:13,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:13,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:13,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:13,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:20:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:13,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266147168] [2020-10-14 05:20:13,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:13,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:20:13,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204816095] [2020-10-14 05:20:13,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:20:13,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:20:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:20:13,938 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 14 states. [2020-10-14 05:20:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:14,207 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-14 05:20:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:20:14,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-14 05:20:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:14,209 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:20:14,210 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:20:14,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:20:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:20:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 05:20:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:20:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-14 05:20:14,217 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 39 [2020-10-14 05:20:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:14,217 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-14 05:20:14,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:20:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-14 05:20:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:20:14,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:14,219 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:14,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:20:14,219 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1891479954, now seen corresponding path program 10 times [2020-10-14 05:20:14,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:14,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378188383] [2020-10-14 05:20:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:14,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:14,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:14,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:20:14,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-14 05:20:14,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:14,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:20:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:14,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:20:14,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:14,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:14,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:14,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:14,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:14,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:14,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:14,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:14,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:14,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:14,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:14,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:14,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:14,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378188383] [2020-10-14 05:20:14,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:14,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:20:14,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426526008] [2020-10-14 05:20:14,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:20:14,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:14,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:20:14,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:20:14,850 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 15 states. [2020-10-14 05:20:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:15,086 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-14 05:20:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:20:15,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-14 05:20:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:15,087 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:20:15,087 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:20:15,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:20:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:20:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 05:20:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:20:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-10-14 05:20:15,100 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 42 [2020-10-14 05:20:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:15,101 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-10-14 05:20:15,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:20:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-10-14 05:20:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:20:15,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:15,103 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:15,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:20:15,103 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1363997687, now seen corresponding path program 11 times [2020-10-14 05:20:15,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:15,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303384988] [2020-10-14 05:20:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:15,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-14 05:20:15,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:15,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:20:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:20:15,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:15,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:15,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:15,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:15,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:15,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:15,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:15,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:15,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303384988] [2020-10-14 05:20:15,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:15,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:20:15,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197675772] [2020-10-14 05:20:15,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:20:15,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:20:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:20:15,652 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 16 states. [2020-10-14 05:20:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:15,901 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-14 05:20:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:20:15,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-14 05:20:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:15,903 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:20:15,903 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:20:15,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:20:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:20:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 05:20:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:20:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-14 05:20:15,910 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 45 [2020-10-14 05:20:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:15,911 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-14 05:20:15,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:20:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-14 05:20:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:20:15,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:15,912 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:15,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:20:15,912 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash -641889742, now seen corresponding path program 12 times [2020-10-14 05:20:15,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:15,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426156801] [2020-10-14 05:20:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:15,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:16,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:16,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:20:16,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:16,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-14 05:20:16,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:16,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:16,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:20:16,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:20:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:16,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:16,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:16,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:16,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:16,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:16,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:16,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:16,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:16,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:16,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426156801] [2020-10-14 05:20:16,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:16,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:20:16,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388849246] [2020-10-14 05:20:16,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:20:16,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:20:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:20:16,514 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 17 states. [2020-10-14 05:20:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:16,800 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-14 05:20:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:20:16,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-14 05:20:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:16,801 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:20:16,801 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:20:16,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:20:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:20:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 05:20:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:20:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-10-14 05:20:16,811 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 48 [2020-10-14 05:20:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:16,811 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-10-14 05:20:16,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:20:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-10-14 05:20:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:20:16,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:16,816 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:16,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:20:16,816 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1815285911, now seen corresponding path program 13 times [2020-10-14 05:20:16,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:16,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112560486] [2020-10-14 05:20:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:16,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:17,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:17,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:20:17,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:17,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-14 05:20:17,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:17,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:17,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:20:17,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:20:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:17,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:17,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:17,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:17,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:17,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:17,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:17,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:17,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:17,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112560486] [2020-10-14 05:20:17,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:17,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:20:17,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686808787] [2020-10-14 05:20:17,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:20:17,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:20:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:20:17,527 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 18 states. [2020-10-14 05:20:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:17,831 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2020-10-14 05:20:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:20:17,832 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-14 05:20:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:17,833 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:20:17,833 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:20:17,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:20:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:20:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-14 05:20:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:20:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-10-14 05:20:17,841 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2020-10-14 05:20:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:17,841 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-10-14 05:20:17,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:20:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-10-14 05:20:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:20:17,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:17,843 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:17,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:20:17,843 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1721734446, now seen corresponding path program 14 times [2020-10-14 05:20:17,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:17,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68161364] [2020-10-14 05:20:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:17,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:18,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:18,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:20:18,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:18,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-14 05:20:18,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:18,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:18,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:20:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:20:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:18,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:18,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:18,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:18,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:18,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:18,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:18,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:18,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:18,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:18,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:18,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:18,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:18,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68161364] [2020-10-14 05:20:18,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:18,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:20:18,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564809441] [2020-10-14 05:20:18,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:20:18,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:20:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:20:18,686 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 19 states. [2020-10-14 05:20:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:19,045 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-10-14 05:20:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:20:19,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-14 05:20:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:19,047 INFO L225 Difference]: With dead ends: 63 [2020-10-14 05:20:19,047 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 05:20:19,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:20:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 05:20:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-14 05:20:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:20:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-10-14 05:20:19,071 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 54 [2020-10-14 05:20:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:19,072 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-10-14 05:20:19,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:20:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-10-14 05:20:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 05:20:19,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:19,073 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:19,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:20:19,074 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2131151561, now seen corresponding path program 15 times [2020-10-14 05:20:19,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:19,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867949262] [2020-10-14 05:20:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:19,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:19,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:19,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 05:20:19,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:19,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-14 05:20:19,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:19,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:20:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:20:19,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:19,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:19,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:19,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:19,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:19,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:19,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:19,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:19,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:19,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:19,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:19,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:19,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:19,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867949262] [2020-10-14 05:20:19,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:19,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:20:19,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479324260] [2020-10-14 05:20:19,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:20:19,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:20:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:20:19,883 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 20 states. [2020-10-14 05:20:20,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:20,249 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-10-14 05:20:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:20:20,250 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-14 05:20:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:20,250 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:20:20,250 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:20:20,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:20:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:20:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 05:20:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:20:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-10-14 05:20:20,258 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 57 [2020-10-14 05:20:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:20,258 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-10-14 05:20:20,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:20:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-10-14 05:20:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:20:20,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:20,259 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:20,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:20:20,260 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:20,260 INFO L82 PathProgramCache]: Analyzing trace with hash 457200498, now seen corresponding path program 16 times [2020-10-14 05:20:20,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:20,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544306849] [2020-10-14 05:20:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:20,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:20,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:20,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:20:20,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:20,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-14 05:20:20,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:20,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:20,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:20:20,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:20,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:20:20,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:21,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:21,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:21,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:21,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:21,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:21,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:21,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:21,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:21,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:21,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544306849] [2020-10-14 05:20:21,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:21,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:20:21,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062427817] [2020-10-14 05:20:21,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:20:21,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:21,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:20:21,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:20:21,151 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 21 states. [2020-10-14 05:20:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:21,568 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2020-10-14 05:20:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:20:21,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-10-14 05:20:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:21,569 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:20:21,569 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:20:21,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:20:21,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:20:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-14 05:20:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:20:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-14 05:20:21,576 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 60 [2020-10-14 05:20:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:21,577 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-14 05:20:21,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:20:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-14 05:20:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 05:20:21,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:21,578 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:21,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:20:21,578 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash 646356521, now seen corresponding path program 17 times [2020-10-14 05:20:21,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:21,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054385966] [2020-10-14 05:20:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:21,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:22,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:22,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 05:20:22,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-14 05:20:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:22,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:20:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:20:22,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:22,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:22,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:22,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:22,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:22,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:22,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:22,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:22,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:22,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:22,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054385966] [2020-10-14 05:20:22,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:22,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:20:22,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412733768] [2020-10-14 05:20:22,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:20:22,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:20:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:20:22,547 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 22 states. [2020-10-14 05:20:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:23,039 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-10-14 05:20:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:20:23,040 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-14 05:20:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:23,041 INFO L225 Difference]: With dead ends: 72 [2020-10-14 05:20:23,041 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:20:23,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:20:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:20:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:20:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:20:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-10-14 05:20:23,062 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 63 [2020-10-14 05:20:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:23,062 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-10-14 05:20:23,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:20:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-10-14 05:20:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:20:23,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:23,064 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:23,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:20:23,064 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash 796345362, now seen corresponding path program 18 times [2020-10-14 05:20:23,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:23,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504371935] [2020-10-14 05:20:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:23,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:23,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:20:23,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:23,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-14 05:20:23,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:23,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:20:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:20:23,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:23,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:23,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:23,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:23,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:23,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:23,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:23,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:23,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:23,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:23,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:23,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:23,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504371935] [2020-10-14 05:20:23,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:23,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:20:23,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112011622] [2020-10-14 05:20:23,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:20:23,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:20:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:20:23,966 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 23 states. [2020-10-14 05:20:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:24,464 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-10-14 05:20:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:20:24,465 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-10-14 05:20:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:24,466 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:20:24,466 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:20:24,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:20:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:20:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-14 05:20:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:20:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-10-14 05:20:24,474 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 66 [2020-10-14 05:20:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:24,475 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-10-14 05:20:24,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:20:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-10-14 05:20:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 05:20:24,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:24,476 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:24,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:20:24,476 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:24,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1947047543, now seen corresponding path program 19 times [2020-10-14 05:20:24,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:24,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379492205] [2020-10-14 05:20:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:25,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:25,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:20:25,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:25,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-14 05:20:25,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:25,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:20:25,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:25,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 05:20:25,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:25,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:25,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:25,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:25,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:25,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:25,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:25,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:25,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:25,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:25,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:25,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:25,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379492205] [2020-10-14 05:20:25,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:25,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:20:25,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593856097] [2020-10-14 05:20:25,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:20:25,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:25,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:20:25,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:20:25,508 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 24 states. [2020-10-14 05:20:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:26,058 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-10-14 05:20:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:20:26,058 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-14 05:20:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:26,059 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:20:26,059 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 05:20:26,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:20:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 05:20:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-14 05:20:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:20:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-14 05:20:26,069 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 69 [2020-10-14 05:20:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:26,069 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-14 05:20:26,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:20:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-14 05:20:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:20:26,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:26,070 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:26,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:20:26,070 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1432404814, now seen corresponding path program 20 times [2020-10-14 05:20:26,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:26,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856954145] [2020-10-14 05:20:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:26,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:26,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:26,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:20:26,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:26,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-14 05:20:26,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:26,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:26,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:20:26,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:26,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 05:20:26,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:27,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:27,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:27,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:27,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:27,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:27,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:27,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:27,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:27,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:27,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:27,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:27,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856954145] [2020-10-14 05:20:27,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:27,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:20:27,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814332264] [2020-10-14 05:20:27,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:20:27,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:20:27,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:20:27,144 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 25 states. [2020-10-14 05:20:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:27,787 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-10-14 05:20:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:20:27,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-14 05:20:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:27,791 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:20:27,791 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:20:27,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:20:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:20:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-14 05:20:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:20:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-10-14 05:20:27,799 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 72 [2020-10-14 05:20:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:27,799 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-10-14 05:20:27,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:20:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-10-14 05:20:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 05:20:27,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:27,800 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:27,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:20:27,801 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1550855401, now seen corresponding path program 21 times [2020-10-14 05:20:27,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:27,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037280072] [2020-10-14 05:20:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:28,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:28,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 05:20:28,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:28,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-14 05:20:28,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:28,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:20:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 05:20:28,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:28,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:28,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:28,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:28,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:28,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:28,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:28,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:28,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:28,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:28,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037280072] [2020-10-14 05:20:28,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:28,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:20:28,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708244352] [2020-10-14 05:20:28,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:20:28,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:20:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:20:28,928 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 26 states. [2020-10-14 05:20:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:29,655 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-10-14 05:20:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:20:29,656 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-14 05:20:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:29,657 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:20:29,658 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 05:20:29,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:20:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 05:20:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-14 05:20:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:20:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-10-14 05:20:29,666 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 75 [2020-10-14 05:20:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:29,666 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-10-14 05:20:29,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:20:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-10-14 05:20:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 05:20:29,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:29,667 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:29,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:20:29,668 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash 97664338, now seen corresponding path program 22 times [2020-10-14 05:20:29,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:29,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270087451] [2020-10-14 05:20:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:29,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:30,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:30,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 05:20:30,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:30,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-14 05:20:30,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:30,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:30,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:20:30,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:30,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 05:20:30,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:30,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:30,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:30,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:30,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:30,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:30,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:30,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:30,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:30,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:30,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270087451] [2020-10-14 05:20:30,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:30,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:20:30,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277900315] [2020-10-14 05:20:30,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:20:30,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:30,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:20:30,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:20:30,835 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 27 states. [2020-10-14 05:20:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:31,600 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2020-10-14 05:20:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:20:31,601 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-10-14 05:20:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:31,602 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:20:31,602 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:20:31,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:20:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:20:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-14 05:20:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 05:20:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-10-14 05:20:31,609 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 78 [2020-10-14 05:20:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:31,610 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-10-14 05:20:31,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:20:31,610 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-10-14 05:20:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 05:20:31,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:31,611 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:31,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:20:31,611 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:31,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1353050185, now seen corresponding path program 23 times [2020-10-14 05:20:31,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:31,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041027523] [2020-10-14 05:20:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:31,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:32,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:32,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 05:20:32,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-14 05:20:32,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:32,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:20:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 05:20:32,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:33,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:33,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:33,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:33,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:33,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:33,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:33,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:33,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:33,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:33,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041027523] [2020-10-14 05:20:33,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:33,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:20:33,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909997136] [2020-10-14 05:20:33,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:20:33,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:33,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:20:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:20:33,310 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 28 states. [2020-10-14 05:20:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:34,180 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-10-14 05:20:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:20:34,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-14 05:20:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:34,182 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:20:34,183 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:20:34,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:20:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:20:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-14 05:20:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:20:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2020-10-14 05:20:34,195 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 81 [2020-10-14 05:20:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:34,195 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2020-10-14 05:20:34,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:20:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2020-10-14 05:20:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:20:34,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:34,197 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:34,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:20:34,198 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:34,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:34,198 INFO L82 PathProgramCache]: Analyzing trace with hash -22395406, now seen corresponding path program 24 times [2020-10-14 05:20:34,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:34,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20560815] [2020-10-14 05:20:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:34,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:35,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:35,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 05:20:35,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-14 05:20:35,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:35,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:20:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 05:20:35,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:35,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:35,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:35,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:35,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:35,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:35,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:35,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:35,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:35,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:35,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20560815] [2020-10-14 05:20:35,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:35,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:20:35,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458154093] [2020-10-14 05:20:35,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:20:35,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:35,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:20:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:20:35,721 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 29 states. [2020-10-14 05:20:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:36,601 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-10-14 05:20:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:20:36,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-10-14 05:20:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:36,603 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:20:36,603 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:20:36,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:20:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:20:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-14 05:20:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 05:20:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2020-10-14 05:20:36,611 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 84 [2020-10-14 05:20:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:36,612 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2020-10-14 05:20:36,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:20:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2020-10-14 05:20:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 05:20:36,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:36,613 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:36,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:20:36,613 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:36,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1933993047, now seen corresponding path program 25 times [2020-10-14 05:20:36,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:36,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425909218] [2020-10-14 05:20:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:36,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:37,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:37,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 05:20:37,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:37,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 936 [2020-10-14 05:20:37,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:37,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:37,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:20:37,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:37,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 05:20:37,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:38,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:38,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:38,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:38,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:38,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:38,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:38,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:38,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:38,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:38,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425909218] [2020-10-14 05:20:38,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:38,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:20:38,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319732163] [2020-10-14 05:20:38,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:20:38,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:20:38,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:20:38,239 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand 30 states. [2020-10-14 05:20:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:39,192 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-10-14 05:20:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:20:39,192 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-14 05:20:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:39,194 INFO L225 Difference]: With dead ends: 96 [2020-10-14 05:20:39,194 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 05:20:39,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:20:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 05:20:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-14 05:20:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:20:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2020-10-14 05:20:39,205 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 87 [2020-10-14 05:20:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:39,205 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2020-10-14 05:20:39,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:20:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2020-10-14 05:20:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 05:20:39,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:39,206 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:39,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:20:39,207 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash 927028882, now seen corresponding path program 26 times [2020-10-14 05:20:39,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:39,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094575252] [2020-10-14 05:20:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:39,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:40,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:40,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:20:40,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:40,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-14 05:20:40,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:40,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:20:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:40,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 05:20:40,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:40,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:40,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:40,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:40,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:40,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:40,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:40,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:40,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:40,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:40,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:40,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:40,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:41,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094575252] [2020-10-14 05:20:41,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:41,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:20:41,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831166432] [2020-10-14 05:20:41,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:20:41,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:20:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:20:41,004 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 31 states. [2020-10-14 05:20:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:42,030 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-10-14 05:20:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:20:42,031 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2020-10-14 05:20:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:42,032 INFO L225 Difference]: With dead ends: 99 [2020-10-14 05:20:42,032 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 05:20:42,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:20:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 05:20:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-14 05:20:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 05:20:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-10-14 05:20:42,042 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 90 [2020-10-14 05:20:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:42,042 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-10-14 05:20:42,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:20:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-10-14 05:20:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 05:20:42,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:42,043 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:42,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:20:42,043 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:42,044 INFO L82 PathProgramCache]: Analyzing trace with hash 5326601, now seen corresponding path program 27 times [2020-10-14 05:20:42,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:42,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525392114] [2020-10-14 05:20:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 05:20:43,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:43,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-14 05:20:43,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:20:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 05:20:43,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:43,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:43,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:43,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:43,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:43,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:43,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:43,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525392114] [2020-10-14 05:20:43,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:43,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:20:43,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051507316] [2020-10-14 05:20:43,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:20:43,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:20:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:20:43,831 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 32 states. [2020-10-14 05:20:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:44,933 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-10-14 05:20:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:20:44,933 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-10-14 05:20:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:44,935 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:20:44,935 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:20:44,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:20:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:20:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-14 05:20:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 05:20:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2020-10-14 05:20:44,948 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 93 [2020-10-14 05:20:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:44,948 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2020-10-14 05:20:44,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:20:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2020-10-14 05:20:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 05:20:44,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:44,949 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:44,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:20:44,950 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash -701403342, now seen corresponding path program 28 times [2020-10-14 05:20:44,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:44,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229175171] [2020-10-14 05:20:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:45,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:45,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 05:20:45,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:46,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:46,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:46,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:46,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:46,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:46,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229175171] [2020-10-14 05:20:46,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:46,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:20:46,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439555690] [2020-10-14 05:20:46,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:20:46,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:20:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:20:46,439 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 33 states. [2020-10-14 05:20:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:47,611 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-10-14 05:20:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:20:47,612 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-10-14 05:20:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:47,613 INFO L225 Difference]: With dead ends: 105 [2020-10-14 05:20:47,613 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 05:20:47,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:20:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 05:20:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-14 05:20:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 05:20:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-10-14 05:20:47,622 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 96 [2020-10-14 05:20:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:47,623 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-10-14 05:20:47,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:20:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-10-14 05:20:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 05:20:47,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:47,624 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:47,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:20:47,624 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:47,624 INFO L82 PathProgramCache]: Analyzing trace with hash -963450263, now seen corresponding path program 29 times [2020-10-14 05:20:47,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:47,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872254627] [2020-10-14 05:20:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:47,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:48,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:48,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 05:20:48,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:48,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 05:20:48,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:48,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:20:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 05:20:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:49,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:49,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:49,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:49,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:49,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:49,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:49,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:49,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:49,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:49,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:49,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:49,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872254627] [2020-10-14 05:20:49,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:49,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:20:49,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485040551] [2020-10-14 05:20:49,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:20:49,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:20:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:20:49,206 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 34 states. [2020-10-14 05:20:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:50,504 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2020-10-14 05:20:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:20:50,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-10-14 05:20:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:50,507 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:20:50,507 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 05:20:50,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:20:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 05:20:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-14 05:20:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:20:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2020-10-14 05:20:50,517 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 99 [2020-10-14 05:20:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:50,517 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2020-10-14 05:20:50,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:20:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2020-10-14 05:20:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 05:20:50,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:50,518 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:50,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:20:50,519 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash 647270354, now seen corresponding path program 30 times [2020-10-14 05:20:50,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:50,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172699007] [2020-10-14 05:20:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:50,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:51,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:51,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:20:51,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-14 05:20:51,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:51,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:20:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:51,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-14 05:20:51,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:52,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:52,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:52,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:52,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:52,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:52,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:52,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:52,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172699007] [2020-10-14 05:20:52,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:52,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:20:52,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783793271] [2020-10-14 05:20:52,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:20:52,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:52,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:20:52,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:20:52,158 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand 35 states. [2020-10-14 05:20:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:53,493 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2020-10-14 05:20:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:20:53,493 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 102 [2020-10-14 05:20:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:53,494 INFO L225 Difference]: With dead ends: 111 [2020-10-14 05:20:53,495 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:20:53,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:20:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:20:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-14 05:20:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 05:20:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-10-14 05:20:53,504 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 102 [2020-10-14 05:20:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:53,505 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-10-14 05:20:53,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:20:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-10-14 05:20:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 05:20:53,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:53,506 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:53,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:20:53,506 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:53,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2044426807, now seen corresponding path program 31 times [2020-10-14 05:20:53,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:53,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792092358] [2020-10-14 05:20:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:53,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:54,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:54,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 05:20:54,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:55,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:55,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:55,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:55,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:55,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:55,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:55,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:55,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:55,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:55,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:55,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:55,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792092358] [2020-10-14 05:20:55,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:55,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:20:55,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115910503] [2020-10-14 05:20:55,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:20:55,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:20:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:20:55,268 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 36 states. [2020-10-14 05:20:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:56,733 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2020-10-14 05:20:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:20:56,734 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-10-14 05:20:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:56,735 INFO L225 Difference]: With dead ends: 114 [2020-10-14 05:20:56,735 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:20:56,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:20:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:20:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-14 05:20:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:20:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2020-10-14 05:20:56,745 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 105 [2020-10-14 05:20:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:56,746 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-10-14 05:20:56,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:20:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2020-10-14 05:20:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 05:20:56,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:56,747 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:56,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:20:56,747 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 939833458, now seen corresponding path program 32 times [2020-10-14 05:20:56,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:56,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446286226] [2020-10-14 05:20:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:57,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:57,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:20:57,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:57,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-14 05:20:57,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:57,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:20:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-14 05:20:57,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:58,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:58,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:58,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:58,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:58,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:58,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446286226] [2020-10-14 05:20:58,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:58,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:20:58,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854644277] [2020-10-14 05:20:58,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:20:58,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:20:58,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:20:58,583 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand 37 states. [2020-10-14 05:21:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:00,087 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2020-10-14 05:21:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:21:00,088 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-10-14 05:21:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:00,090 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:21:00,090 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 05:21:00,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:21:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 05:21:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-14 05:21:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 05:21:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2020-10-14 05:21:00,102 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 108 [2020-10-14 05:21:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:00,102 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 146 transitions. [2020-10-14 05:21:00,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:21:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 146 transitions. [2020-10-14 05:21:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 05:21:00,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:00,103 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:00,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:21:00,104 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash -785639127, now seen corresponding path program 33 times [2020-10-14 05:21:00,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:00,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908093366] [2020-10-14 05:21:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:00,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:01,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:01,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 05:21:01,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:01,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-14 05:21:01,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:01,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:21:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 05:21:01,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:02,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:02,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:02,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:02,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:02,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:02,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:02,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:02,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:02,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:02,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:02,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:02,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908093366] [2020-10-14 05:21:02,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:02,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:21:02,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076896056] [2020-10-14 05:21:02,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:21:02,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:21:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:21:02,394 INFO L87 Difference]: Start difference. First operand 112 states and 146 transitions. Second operand 38 states. [2020-10-14 05:21:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:04,016 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2020-10-14 05:21:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:21:04,017 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 111 [2020-10-14 05:21:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:04,019 INFO L225 Difference]: With dead ends: 120 [2020-10-14 05:21:04,019 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:21:04,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:21:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:21:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-14 05:21:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 05:21:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 150 transitions. [2020-10-14 05:21:04,032 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 150 transitions. Word has length 111 [2020-10-14 05:21:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:04,032 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 150 transitions. [2020-10-14 05:21:04,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:21:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 150 transitions. [2020-10-14 05:21:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 05:21:04,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:04,034 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:04,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:21:04,035 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2124146962, now seen corresponding path program 34 times [2020-10-14 05:21:04,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:04,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583951935] [2020-10-14 05:21:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:05,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:05,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 05:21:05,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:05,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-14 05:21:05,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:05,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:21:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:05,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 05:21:05,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:06,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:06,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:06,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:06,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:06,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:06,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:06,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:06,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:06,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:06,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:06,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:06,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:06,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583951935] [2020-10-14 05:21:06,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:06,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:21:06,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853259244] [2020-10-14 05:21:06,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:21:06,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:06,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:21:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:21:06,074 INFO L87 Difference]: Start difference. First operand 115 states and 150 transitions. Second operand 39 states. [2020-10-14 05:21:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:07,787 INFO L93 Difference]: Finished difference Result 123 states and 159 transitions. [2020-10-14 05:21:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:21:07,788 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 114 [2020-10-14 05:21:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:07,790 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:21:07,790 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:21:07,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:21:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:21:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-14 05:21:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 05:21:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2020-10-14 05:21:07,804 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 114 [2020-10-14 05:21:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:07,804 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2020-10-14 05:21:07,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:21:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2020-10-14 05:21:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 05:21:07,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:07,806 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:07,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:21:07,806 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2058378103, now seen corresponding path program 35 times [2020-10-14 05:21:07,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:07,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716035541] [2020-10-14 05:21:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:07,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:08,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:08,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 05:21:08,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:08,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-14 05:21:08,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:08,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:08,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:21:08,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:08,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 05:21:08,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:10,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:10,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:10,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:10,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:10,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:10,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:10,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:10,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716035541] [2020-10-14 05:21:10,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:10,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 05:21:10,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750241911] [2020-10-14 05:21:10,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 05:21:10,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:10,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 05:21:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:21:10,027 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand 40 states. [2020-10-14 05:21:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:11,897 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2020-10-14 05:21:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 05:21:11,898 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-10-14 05:21:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:11,899 INFO L225 Difference]: With dead ends: 126 [2020-10-14 05:21:11,899 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 05:21:11,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:21:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 05:21:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-14 05:21:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 05:21:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 158 transitions. [2020-10-14 05:21:11,910 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 158 transitions. Word has length 117 [2020-10-14 05:21:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:11,910 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 158 transitions. [2020-10-14 05:21:11,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 05:21:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 158 transitions. [2020-10-14 05:21:11,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 05:21:11,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:11,912 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:11,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:21:11,912 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1928602034, now seen corresponding path program 36 times [2020-10-14 05:21:11,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:11,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097521195] [2020-10-14 05:21:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:13,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:13,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 05:21:13,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:13,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-14 05:21:13,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:13,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 05:21:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-14 05:21:13,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:14,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:14,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:14,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:14,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:14,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:14,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:14,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:14,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:14,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:14,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:14,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:14,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097521195] [2020-10-14 05:21:14,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:14,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 05:21:14,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434743884] [2020-10-14 05:21:14,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 05:21:14,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:14,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 05:21:14,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:21:14,370 INFO L87 Difference]: Start difference. First operand 121 states and 158 transitions. Second operand 41 states. [2020-10-14 05:21:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:16,291 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2020-10-14 05:21:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:21:16,291 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 120 [2020-10-14 05:21:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:16,293 INFO L225 Difference]: With dead ends: 129 [2020-10-14 05:21:16,293 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 05:21:16,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:21:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 05:21:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-14 05:21:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 05:21:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2020-10-14 05:21:16,305 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 120 [2020-10-14 05:21:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:16,305 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2020-10-14 05:21:16,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 05:21:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2020-10-14 05:21:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 05:21:16,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:16,307 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:16,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:21:16,307 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash 733292521, now seen corresponding path program 37 times [2020-10-14 05:21:16,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:16,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271208392] [2020-10-14 05:21:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:16,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:17,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:17,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 05:21:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:18,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:18,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:18,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:18,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:18,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271208392] [2020-10-14 05:21:18,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:18,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 05:21:18,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431958047] [2020-10-14 05:21:18,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 05:21:18,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 05:21:18,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:21:18,780 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand 42 states. [2020-10-14 05:21:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:20,815 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2020-10-14 05:21:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 05:21:20,815 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2020-10-14 05:21:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:20,817 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:21:20,817 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:21:20,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:21:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:21:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-14 05:21:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 05:21:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2020-10-14 05:21:20,831 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 123 [2020-10-14 05:21:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:20,832 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2020-10-14 05:21:20,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 05:21:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2020-10-14 05:21:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 05:21:20,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:20,833 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:20,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:21:20,833 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash 841441874, now seen corresponding path program 38 times [2020-10-14 05:21:20,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:20,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742950823] [2020-10-14 05:21:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:20,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:22,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:22,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 05:21:22,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:22,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-14 05:21:22,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:22,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:22,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 05:21:22,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:22,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-14 05:21:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:23,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:23,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:23,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:23,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:23,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:23,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:23,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:23,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:23,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:23,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742950823] [2020-10-14 05:21:23,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:23,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 05:21:23,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211873431] [2020-10-14 05:21:23,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 05:21:23,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:23,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 05:21:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:21:23,378 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand 43 states. [2020-10-14 05:21:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:25,549 INFO L93 Difference]: Finished difference Result 135 states and 175 transitions. [2020-10-14 05:21:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 05:21:25,550 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 126 [2020-10-14 05:21:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:25,551 INFO L225 Difference]: With dead ends: 135 [2020-10-14 05:21:25,551 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 05:21:25,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:21:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 05:21:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-14 05:21:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 05:21:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2020-10-14 05:21:25,564 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 126 [2020-10-14 05:21:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:25,565 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2020-10-14 05:21:25,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 05:21:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2020-10-14 05:21:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 05:21:25,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:25,566 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:25,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:21:25,566 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1493345097, now seen corresponding path program 39 times [2020-10-14 05:21:25,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:25,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651816757] [2020-10-14 05:21:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:25,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:26,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:26,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 05:21:26,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:26,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-14 05:21:26,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:26,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:26,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 05:21:26,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:26,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-14 05:21:26,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:28,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:28,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:28,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:28,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:28,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:28,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:28,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:28,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:28,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:28,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:28,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651816757] [2020-10-14 05:21:28,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:28,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 05:21:28,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068569691] [2020-10-14 05:21:28,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 05:21:28,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:28,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 05:21:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:21:28,261 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand 44 states. [2020-10-14 05:21:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:30,561 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-10-14 05:21:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 05:21:30,562 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2020-10-14 05:21:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:30,563 INFO L225 Difference]: With dead ends: 138 [2020-10-14 05:21:30,564 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 05:21:30,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:21:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 05:21:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-14 05:21:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 05:21:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2020-10-14 05:21:30,576 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 129 [2020-10-14 05:21:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:30,577 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2020-10-14 05:21:30,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 05:21:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2020-10-14 05:21:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 05:21:30,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:30,578 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:30,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:21:30,578 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:30,578 INFO L82 PathProgramCache]: Analyzing trace with hash 500148978, now seen corresponding path program 40 times [2020-10-14 05:21:30,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:30,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170593206] [2020-10-14 05:21:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:32,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1489 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-14 05:21:32,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:33,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:33,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:33,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:33,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:33,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:33,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:33,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:33,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:33,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:33,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:33,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:33,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:33,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170593206] [2020-10-14 05:21:33,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:33,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 05:21:33,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354739827] [2020-10-14 05:21:33,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 05:21:33,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 05:21:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:21:33,515 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand 45 states. [2020-10-14 05:21:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:35,886 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2020-10-14 05:21:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 05:21:35,887 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 132 [2020-10-14 05:21:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:35,889 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:21:35,889 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 05:21:35,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:21:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 05:21:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-14 05:21:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 05:21:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2020-10-14 05:21:35,905 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 132 [2020-10-14 05:21:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:35,906 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2020-10-14 05:21:35,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 05:21:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2020-10-14 05:21:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 05:21:35,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:35,907 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:35,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:21:35,908 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash 224269993, now seen corresponding path program 41 times [2020-10-14 05:21:35,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:35,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391184625] [2020-10-14 05:21:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:35,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:37,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:37,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 05:21:37,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:37,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-10-14 05:21:37,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:37,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 05:21:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-14 05:21:37,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:38,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:38,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:38,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:38,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:38,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:38,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:38,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:38,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:38,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:38,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:38,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:39,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391184625] [2020-10-14 05:21:39,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:39,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 05:21:39,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906321081] [2020-10-14 05:21:39,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 05:21:39,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 05:21:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:21:39,025 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand 46 states. [2020-10-14 05:21:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:41,560 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2020-10-14 05:21:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 05:21:41,561 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 135 [2020-10-14 05:21:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:41,563 INFO L225 Difference]: With dead ends: 144 [2020-10-14 05:21:41,563 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 05:21:41,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:21:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 05:21:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-14 05:21:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 05:21:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2020-10-14 05:21:41,578 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 135 [2020-10-14 05:21:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:41,578 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2020-10-14 05:21:41,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 05:21:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2020-10-14 05:21:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 05:21:41,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:41,580 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:41,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:21:41,580 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:41,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2080832402, now seen corresponding path program 42 times [2020-10-14 05:21:41,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:41,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332851823] [2020-10-14 05:21:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:41,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:43,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:43,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1700 [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-14 05:21:43,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:44,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:44,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:44,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:44,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:44,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:44,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:44,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:44,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:44,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332851823] [2020-10-14 05:21:44,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:44,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 05:21:44,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569617215] [2020-10-14 05:21:44,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 05:21:44,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 05:21:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:21:44,852 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand 47 states. [2020-10-14 05:21:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:47,505 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2020-10-14 05:21:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 05:21:47,506 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 138 [2020-10-14 05:21:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:47,508 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:21:47,508 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 05:21:47,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:21:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 05:21:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-14 05:21:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 05:21:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2020-10-14 05:21:47,523 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 138 [2020-10-14 05:21:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:47,524 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2020-10-14 05:21:47,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 05:21:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2020-10-14 05:21:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-14 05:21:47,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:47,525 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:47,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:21:47,525 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:47,526 INFO L82 PathProgramCache]: Analyzing trace with hash 342721033, now seen corresponding path program 43 times [2020-10-14 05:21:47,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:47,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753100229] [2020-10-14 05:21:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:49,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:49,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 05:21:49,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:49,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1832 [2020-10-14 05:21:49,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:49,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 05:21:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:49,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 05:21:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:51,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:51,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:51,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:51,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:51,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:51,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:51,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:51,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753100229] [2020-10-14 05:21:51,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:51,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 05:21:51,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433821864] [2020-10-14 05:21:51,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 05:21:51,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 05:21:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:21:51,061 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand 48 states. [2020-10-14 05:21:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:53,871 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2020-10-14 05:21:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 05:21:53,872 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2020-10-14 05:21:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:53,873 INFO L225 Difference]: With dead ends: 150 [2020-10-14 05:21:53,873 INFO L226 Difference]: Without dead ends: 145 [2020-10-14 05:21:53,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:21:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-14 05:21:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-14 05:21:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 05:21:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 190 transitions. [2020-10-14 05:21:53,889 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 190 transitions. Word has length 141 [2020-10-14 05:21:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:53,889 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 190 transitions. [2020-10-14 05:21:53,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 05:21:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2020-10-14 05:21:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 05:21:53,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:53,890 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:53,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:21:53,891 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash 392647730, now seen corresponding path program 44 times [2020-10-14 05:21:53,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:53,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870090046] [2020-10-14 05:21:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:55,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:55,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 05:21:55,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-14 05:21:55,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:55,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 05:21:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-14 05:21:55,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:57,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:57,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:57,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:57,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:57,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:57,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:57,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:57,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:57,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870090046] [2020-10-14 05:21:57,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:57,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 05:21:57,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835581216] [2020-10-14 05:21:57,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 05:21:57,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:57,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 05:21:57,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:21:57,392 INFO L87 Difference]: Start difference. First operand 145 states and 190 transitions. Second operand 49 states. [2020-10-14 05:22:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:00,423 INFO L93 Difference]: Finished difference Result 153 states and 199 transitions. [2020-10-14 05:22:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 05:22:00,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 144 [2020-10-14 05:22:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:00,427 INFO L225 Difference]: With dead ends: 153 [2020-10-14 05:22:00,427 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 05:22:00,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:22:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 05:22:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-14 05:22:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 05:22:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-10-14 05:22:00,443 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 144 [2020-10-14 05:22:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:00,444 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-10-14 05:22:00,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 05:22:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-10-14 05:22:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 05:22:00,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:00,445 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:00,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:22:00,445 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1700193641, now seen corresponding path program 45 times [2020-10-14 05:22:00,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:00,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079136845] [2020-10-14 05:22:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:02,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:02,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 05:22:02,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:02,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1917 [2020-10-14 05:22:02,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:02,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:02,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 05:22:02,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:02,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-14 05:22:02,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:04,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:04,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:04,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:04,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:04,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:04,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:22:04,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:04,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:04,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:04,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:04,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:04,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:04,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079136845] [2020-10-14 05:22:04,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:04,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 05:22:04,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076016260] [2020-10-14 05:22:04,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 05:22:04,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 05:22:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:22:04,255 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 50 states. [2020-10-14 05:22:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:07,358 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2020-10-14 05:22:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 05:22:07,359 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 147 [2020-10-14 05:22:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:07,361 INFO L225 Difference]: With dead ends: 156 [2020-10-14 05:22:07,361 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 05:22:07,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:22:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 05:22:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-14 05:22:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 05:22:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2020-10-14 05:22:07,376 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 147 [2020-10-14 05:22:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:07,377 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2020-10-14 05:22:07,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 05:22:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2020-10-14 05:22:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 05:22:07,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:07,378 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:07,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:22:07,378 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash -552946478, now seen corresponding path program 46 times [2020-10-14 05:22:07,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:07,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632573801] [2020-10-14 05:22:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:07,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:09,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:09,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 05:22:09,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:09,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1955 [2020-10-14 05:22:09,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:09,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 05:22:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:09,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-14 05:22:09,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:11,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:11,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:11,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:11,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:11,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:22:11,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:11,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:11,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632573801] [2020-10-14 05:22:11,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:11,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 05:22:11,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738074550] [2020-10-14 05:22:11,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 05:22:11,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:11,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 05:22:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:22:11,316 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand 51 states. [2020-10-14 05:22:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:14,531 INFO L93 Difference]: Finished difference Result 159 states and 207 transitions. [2020-10-14 05:22:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 05:22:14,532 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 150 [2020-10-14 05:22:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:14,534 INFO L225 Difference]: With dead ends: 159 [2020-10-14 05:22:14,534 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 05:22:14,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:22:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 05:22:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-14 05:22:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 05:22:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 202 transitions. [2020-10-14 05:22:14,550 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 202 transitions. Word has length 150 [2020-10-14 05:22:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:14,551 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 202 transitions. [2020-10-14 05:22:14,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 05:22:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 202 transitions. [2020-10-14 05:22:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 05:22:14,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:14,552 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:14,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:22:14,552 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:14,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2101329719, now seen corresponding path program 47 times [2020-10-14 05:22:14,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:14,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212129908] [2020-10-14 05:22:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:16,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2102 [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-14 05:22:16,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:18,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:18,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:18,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:18,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:18,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:18,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:22:18,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:18,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:18,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:18,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:18,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:18,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:22:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:18,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212129908] [2020-10-14 05:22:18,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:18,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 05:22:18,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971932961] [2020-10-14 05:22:18,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 05:22:18,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:18,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 05:22:18,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:22:18,720 INFO L87 Difference]: Start difference. First operand 154 states and 202 transitions. Second operand 52 states. [2020-10-14 05:22:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:22,107 INFO L93 Difference]: Finished difference Result 162 states and 211 transitions. [2020-10-14 05:22:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 05:22:22,108 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 153 [2020-10-14 05:22:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:22,109 INFO L225 Difference]: With dead ends: 162 [2020-10-14 05:22:22,109 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 05:22:22,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:22:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 05:22:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-14 05:22:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 05:22:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2020-10-14 05:22:22,126 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 153 [2020-10-14 05:22:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:22,127 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2020-10-14 05:22:22,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 05:22:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2020-10-14 05:22:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 05:22:22,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:22,128 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:22,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:22:22,129 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2037703310, now seen corresponding path program 48 times [2020-10-14 05:22:22,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:22,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264108892] [2020-10-14 05:22:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:22,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:24,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2352 [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-14 05:22:24,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:26,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:26,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:26,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:26,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:26,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:26,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:26,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:26,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:26,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:26,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264108892] [2020-10-14 05:22:26,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:26,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 05:22:26,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068978796] [2020-10-14 05:22:26,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 05:22:26,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 05:22:26,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:22:26,714 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand 53 states. [2020-10-14 05:22:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:30,228 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2020-10-14 05:22:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 05:22:30,229 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 156 [2020-10-14 05:22:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:30,230 INFO L225 Difference]: With dead ends: 165 [2020-10-14 05:22:30,231 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 05:22:30,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:22:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 05:22:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-14 05:22:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 05:22:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 210 transitions. [2020-10-14 05:22:30,248 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 210 transitions. Word has length 156 [2020-10-14 05:22:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:30,249 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 210 transitions. [2020-10-14 05:22:30,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 05:22:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 210 transitions. [2020-10-14 05:22:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-14 05:22:30,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:30,250 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:30,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:22:30,251 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash -623930327, now seen corresponding path program 49 times [2020-10-14 05:22:30,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:30,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556885691] [2020-10-14 05:22:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:30,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:32,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:32,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-14 05:22:32,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2380 [2020-10-14 05:22:32,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:32,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 05:22:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-14 05:22:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:34,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:34,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:35,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556885691] [2020-10-14 05:22:35,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:35,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 05:22:35,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609226243] [2020-10-14 05:22:35,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 05:22:35,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 05:22:35,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:22:35,012 INFO L87 Difference]: Start difference. First operand 160 states and 210 transitions. Second operand 54 states. [2020-10-14 05:22:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:38,694 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2020-10-14 05:22:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 05:22:38,695 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 159 [2020-10-14 05:22:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:38,697 INFO L225 Difference]: With dead ends: 168 [2020-10-14 05:22:38,697 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 05:22:38,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:22:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 05:22:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-14 05:22:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 05:22:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2020-10-14 05:22:38,715 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 214 transitions. Word has length 159 [2020-10-14 05:22:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:38,715 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 214 transitions. [2020-10-14 05:22:38,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 05:22:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 214 transitions. [2020-10-14 05:22:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-14 05:22:38,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:38,717 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:38,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:22:38,717 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash 637701650, now seen corresponding path program 50 times [2020-10-14 05:22:38,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:38,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821236630] [2020-10-14 05:22:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:38,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:41,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:41,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-14 05:22:41,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:41,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2558 [2020-10-14 05:22:41,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:41,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 05:22:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:41,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-14 05:22:41,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:43,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:43,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:43,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821236630] [2020-10-14 05:22:43,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:43,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 05:22:43,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050404190] [2020-10-14 05:22:43,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 05:22:43,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 05:22:43,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:22:43,829 INFO L87 Difference]: Start difference. First operand 163 states and 214 transitions. Second operand 55 states. [2020-10-14 05:22:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:47,706 INFO L93 Difference]: Finished difference Result 171 states and 223 transitions. [2020-10-14 05:22:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 05:22:47,707 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 162 [2020-10-14 05:22:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:47,709 INFO L225 Difference]: With dead ends: 171 [2020-10-14 05:22:47,709 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 05:22:47,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:22:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 05:22:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-14 05:22:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-14 05:22:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2020-10-14 05:22:47,728 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 162 [2020-10-14 05:22:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:47,728 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2020-10-14 05:22:47,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 05:22:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2020-10-14 05:22:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 05:22:47,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:47,730 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:47,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:22:47,730 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash 657121161, now seen corresponding path program 51 times [2020-10-14 05:22:47,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:47,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691027677] [2020-10-14 05:22:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:47,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:50,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:50,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-14 05:22:50,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:50,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2657 [2020-10-14 05:22:50,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:50,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:50,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 05:22:50,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-14 05:22:50,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:53,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:53,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:53,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:53,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:53,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:53,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:53,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:53,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 0 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:53,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691027677] [2020-10-14 05:22:53,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:53,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 05:22:53,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101420561] [2020-10-14 05:22:53,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 05:22:53,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 05:22:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:22:53,103 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand 56 states. [2020-10-14 05:22:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:57,095 INFO L93 Difference]: Finished difference Result 174 states and 227 transitions. [2020-10-14 05:22:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 05:22:57,096 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 165 [2020-10-14 05:22:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:57,098 INFO L225 Difference]: With dead ends: 174 [2020-10-14 05:22:57,098 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 05:22:57,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:22:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 05:22:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-14 05:22:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 05:22:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 222 transitions. [2020-10-14 05:22:57,112 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 222 transitions. Word has length 165 [2020-10-14 05:22:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:57,112 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 222 transitions. [2020-10-14 05:22:57,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 05:22:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 222 transitions. [2020-10-14 05:22:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-14 05:22:57,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:57,114 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:57,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:22:57,114 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:57,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:57,114 INFO L82 PathProgramCache]: Analyzing trace with hash -636811598, now seen corresponding path program 52 times [2020-10-14 05:22:57,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:57,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738616104] [2020-10-14 05:22:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:57,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:00,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:00,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-14 05:23:00,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:00,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2886 [2020-10-14 05:23:00,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:00,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:00,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 05:23:00,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:00,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 05:23:00,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:02,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:02,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:02,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:02,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:02,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:02,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:02,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:02,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:23:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 0 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:02,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738616104] [2020-10-14 05:23:02,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:02,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 05:23:02,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990284238] [2020-10-14 05:23:02,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 05:23:02,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 05:23:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:23:02,847 INFO L87 Difference]: Start difference. First operand 169 states and 222 transitions. Second operand 57 states. [2020-10-14 05:23:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:07,517 INFO L93 Difference]: Finished difference Result 177 states and 231 transitions. [2020-10-14 05:23:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 05:23:07,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 168 [2020-10-14 05:23:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:07,520 INFO L225 Difference]: With dead ends: 177 [2020-10-14 05:23:07,521 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 05:23:07,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:23:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 05:23:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-14 05:23:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 05:23:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 226 transitions. [2020-10-14 05:23:07,540 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 226 transitions. Word has length 168 [2020-10-14 05:23:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:07,540 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 226 transitions. [2020-10-14 05:23:07,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 05:23:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 226 transitions. [2020-10-14 05:23:07,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-14 05:23:07,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:07,542 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:07,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:23:07,542 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash -856153367, now seen corresponding path program 53 times [2020-10-14 05:23:07,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:07,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009015015] [2020-10-14 05:23:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:07,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:10,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:10,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 05:23:10,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2997 [2020-10-14 05:23:10,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:10,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 05:23:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-14 05:23:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:13,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:13,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:13,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:13,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:13,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:13,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:13,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:13,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:13,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:13,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:13,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:13,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009015015] [2020-10-14 05:23:13,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:13,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 05:23:13,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676813897] [2020-10-14 05:23:13,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 05:23:13,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:13,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 05:23:13,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:23:13,647 INFO L87 Difference]: Start difference. First operand 172 states and 226 transitions. Second operand 58 states. [2020-10-14 05:23:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:18,169 INFO L93 Difference]: Finished difference Result 180 states and 235 transitions. [2020-10-14 05:23:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 05:23:18,170 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 171 [2020-10-14 05:23:18,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:18,172 INFO L225 Difference]: With dead ends: 180 [2020-10-14 05:23:18,173 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 05:23:18,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:23:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 05:23:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-14 05:23:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 05:23:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2020-10-14 05:23:18,193 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 171 [2020-10-14 05:23:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:18,193 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2020-10-14 05:23:18,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 05:23:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2020-10-14 05:23:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-14 05:23:18,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:18,195 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:18,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:23:18,195 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1673430866, now seen corresponding path program 54 times [2020-10-14 05:23:18,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:18,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678112267] [2020-10-14 05:23:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:18,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:21,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3030 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-14 05:23:21,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:24,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:24,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:24,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:24,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 0 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:24,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678112267] [2020-10-14 05:23:24,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:24,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 05:23:24,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143667926] [2020-10-14 05:23:24,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 05:23:24,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:24,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 05:23:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:23:24,450 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand 59 states. [2020-10-14 05:23:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:29,494 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2020-10-14 05:23:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 05:23:29,496 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 174 [2020-10-14 05:23:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:29,498 INFO L225 Difference]: With dead ends: 183 [2020-10-14 05:23:29,498 INFO L226 Difference]: Without dead ends: 178 [2020-10-14 05:23:29,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:23:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-14 05:23:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-14 05:23:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-14 05:23:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 234 transitions. [2020-10-14 05:23:29,512 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 234 transitions. Word has length 174 [2020-10-14 05:23:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:29,513 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 234 transitions. [2020-10-14 05:23:29,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 05:23:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 234 transitions. [2020-10-14 05:23:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-14 05:23:29,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:29,514 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:29,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:23:29,514 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:29,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1021140553, now seen corresponding path program 55 times [2020-10-14 05:23:29,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:29,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565459450] [2020-10-14 05:23:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:29,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:32,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:32,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-14 05:23:32,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:32,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3302 [2020-10-14 05:23:32,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:32,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:32,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 05:23:32,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:32,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-14 05:23:32,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:36,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:36,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:36,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:36,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:36,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:36,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:36,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:36,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:36,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565459450] [2020-10-14 05:23:36,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:36,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 05:23:36,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481355863] [2020-10-14 05:23:36,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 05:23:36,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:36,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 05:23:36,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:23:36,393 INFO L87 Difference]: Start difference. First operand 178 states and 234 transitions. Second operand 60 states. [2020-10-14 05:23:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:41,774 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2020-10-14 05:23:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 05:23:41,776 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 177 [2020-10-14 05:23:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:41,778 INFO L225 Difference]: With dead ends: 186 [2020-10-14 05:23:41,778 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 05:23:41,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:23:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 05:23:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-10-14 05:23:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 05:23:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 238 transitions. [2020-10-14 05:23:41,794 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 238 transitions. Word has length 177 [2020-10-14 05:23:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:41,795 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 238 transitions. [2020-10-14 05:23:41,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 05:23:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 238 transitions. [2020-10-14 05:23:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-14 05:23:41,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:41,796 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:41,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:23:41,796 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash -927526926, now seen corresponding path program 56 times [2020-10-14 05:23:41,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:41,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356255055] [2020-10-14 05:23:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:41,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:45,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:45,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-14 05:23:45,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:45,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3490 [2020-10-14 05:23:45,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:45,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 05:23:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:45,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-14 05:23:45,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:48,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:48,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:48,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:48,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:48,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:48,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:48,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:48,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:48,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:48,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 0 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:48,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356255055] [2020-10-14 05:23:48,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:48,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 05:23:48,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840187276] [2020-10-14 05:23:48,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 05:23:48,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:48,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 05:23:48,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:23:48,697 INFO L87 Difference]: Start difference. First operand 181 states and 238 transitions. Second operand 61 states. [2020-10-14 05:23:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:53,551 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2020-10-14 05:23:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 05:23:53,553 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 180 [2020-10-14 05:23:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:53,554 INFO L225 Difference]: With dead ends: 189 [2020-10-14 05:23:53,555 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 05:23:53,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:23:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 05:23:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-14 05:23:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-14 05:23:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2020-10-14 05:23:53,575 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 180 [2020-10-14 05:23:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:53,576 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2020-10-14 05:23:53,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 05:23:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2020-10-14 05:23:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-14 05:23:53,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:53,577 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:53,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:23:53,578 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1392546217, now seen corresponding path program 57 times [2020-10-14 05:23:53,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:53,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140663083] [2020-10-14 05:23:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:53,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:56,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:56,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-14 05:23:56,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:56,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-10-14 05:23:56,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:56,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:56,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 05:23:56,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:56,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-14 05:23:56,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:00,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:00,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:00,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:00,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:00,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:00,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:00,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:00,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:00,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:00,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:24:00,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140663083] [2020-10-14 05:24:00,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:00,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 05:24:00,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832371191] [2020-10-14 05:24:00,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 05:24:00,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 05:24:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:24:00,192 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand 62 states.